Message from Management
NOHKEN INC. is committed to providing Customer
Satisfaction through the Creative Endeavors of
the people concerned with Full Respect to their
Humanity.
These three objectives have been at the heart
of our management philosophy since NOHKEN
INC. was established. The broad technological
background and capabilities of our employees are
fully directed towards the introduction of new ideas
and improved products that will better meet our
customer's needs.
To achieve our goals, we do not rely just on
ourselves. We collaborate with others to further
enhance our activities through process that we call
"Alliance Management" which means the exchange
and incorporation of ideas and technologies from all
sources. This powerful combination of ideas helps
us in striving for an unsurpassed level of excellence.
Company History
1965 Established by Mr. Hiroshi Nagashima, the president of NOHKEN INC.
Developed Reciprocating Paddle Level Sensor
1975 Constructed a Head Office in Suita-city, OSAKA
1978 Introduced Capacitance Level Sensor
1981 Developed Hydrostatic Level Measurement System
1984 Developed one probe Vibration Level Sensor
1985 Constructed a factory building in Sanda-city, HYOGO
Formed a capital tie-up with Shanoc Inc., our exporter and importer
1986 Entered into an alliance with Milltronics Ltd. in Canada
1987 Formed a capital and technical tie-up with Seojin Instech Co., Ltd. in Korea
1989 Developed Magnetostrictive Level Measurement System
1990 Entered into an alliance with Druck Ltd. in U.K.
1991 Entered into an alliance with Solartron Mobrey Ltd. in U.K.
Developed Optical Level Sensor
1995 Established Taiwan NOHKEN Co., Ltd. in Taiwan
Entered into an alliance with Smar Equipamentos Ind. Ltda. in Brazil
Introduced Microwave Level Sensor
1996 Entered into an alliance with Multitrode Inc. in Australia
1998 Certified ISO9001 and JIS Z 9901 standards for quality system
Entered into an alliance with Nivus Kontrollgerate GmbH. in Canada
1999 Entered into an alliance with Enraf B.V. in Netherlands
2000 Developed New Capacitance Level Sensor
2001 Entered into an alliance with Siemens AG and Siemens KK in Japan
2002 Constructed a Second Head office
Developed New Vibration Level Sensor
2006 Merger of Shanoc Inc.
1
General Notes for Handling Level Sensors
• Introduction
Level sensors, either of the continuous measurement model which measures the whole range where the level changes, or of the
point level measurement model which detects the material when it reaches the specified points such as high and low, directly use
one of the physical characteristics the measured material has.
For example, float sensors and pressure transmitters utilize the density of measured fluid, capacitance sensors the dielectric
constant, Additionally, solids exhibit some characteristics that liquids do not, including shape, apparent density, angle of repose,
and water content. They are known to change, sometimes enormously, when operating conditions or application environments
change, adversely affecting the operation.
In the following paragraphs, sensors are divided into two groups, liquid level sensors and solid level sensors, and general
instructions for selection and use of level sensors are given based on the characteristics of each group.
LIQUID LEVEL SENSORS
The levels a liquid level sensor measures include: the interface between air and liquid, the one most commonly known as a
level; the interface between liquids, such as water and oil; and the interface between liquid and solid, such as the tank bottom
and the liquid inside it.
Liquids to be measured vary widely. They can be made of a single component or a mixture of multiple components, with
different density, viscosity, or dielectric constant. The state of liquid, such as if it is highly viscous, adhesive, with foam on its
surface, slurry, or easy to crystalize, is also very important in selecting a level sensor.
The state or condition of liquid in the tank, such as its behavior, pressure and temperature, can affect measurement accuracy
and thus is an important factor. Relation between the speed of level change due to filling or discharge and the sensor response
rate, foam because of an agitator, vortex, bubbling, and vibration also require special considerations.
If accuracy is important, the mounting location and method will have to be chosen carefully. In this case, sensors should not
be mounted near the inlet or the outlet, or a guide pipe or a stillpipe may have to be provided to prevent the sensor from being
carried away by the fluid.
Sensors using specific gravity
Liquid characteristics are very important in selecting a level sensor.
Float sensors and pressure sensors utilize specific gravity of the measured liquid. Although change in specific gravity causes
measurement error, the conditions are usually controlled in process measurement or control applications. The specific gravity is
not likely to change in these applications, and level sensors adjusted to the specified specific gravity will work fine. However, it
has to be noted that measurement error can occur when operating conditions are different from the usual states, such as during
startup of the plant.
Sensors using dielectric constant
Capacitive sensors use dielectric constant. Dielectric constant of liquid is generally sensitive to temperature change, and the
value decreases as the temperature rises. For example, dielectric constant of water is 88 at 0˚C, 80 at 20˚C, and 48 at 100˚C.
Thus, temperature conditions must carefully be considered when using a capacitive sensor.
Moreover, temperature change is not the only challenge. Many users use the capacitive sensors assuming the temperature
change will be small after process conditions are decided and there will be no other problem. Even when the temperature change
is small, care must be taken when the measured liquid has small dielectric constant or is adhesive, or when high accuracy
measurement is required.
SOLID LEVEL SENSORS
Solids exhibit totally different characteristics from liquids, with some possibly yet to be satisfactorily explained. It can be said
that solid level sensors have been developed empirically to this day.
Some of the characteristics are explained in the following paragraphs.
Angle of repose
When solid materials are poured onto a horizontal surface, a conical pile will form. The internal angle between the surface of the
pile and the horizontal surface is known as the angle of repose. The slope angle, by the way, at which solid materials start to slide
is called the angle of slide. The angle of slide is smaller than the angle of repose.
The angle of repose varies with the water content, size and shape of the particles, and tends to increase when water content
increases and when the particle diameter decreases.
Solid pressure
While liquid pressure is exerted equally in all directions, solid pressure acts the most strongly in the direction the pressure is
applied, and less strongly in other directions, with the weakest point at a 90 degree angle off the original direction.
When the applied pressure exceeds a certain limit, the particles start to slide.
Pressure exerted on the tank bottom becomes the largest when the solid level is 3 to 5 times the tank inner diameter, however,
at lower levels, most of the weight acts sideways on the tank wall and the downward force does not increase.
2
Bridging
Bridging is one of the characteristics of solid materials that can pose problems.
Solid materials are usually discharged by gravity. Even those with high fluidity can deposit at the tank bottom in a funnel shape
and stop discharging if the outlet is small. Adhesive solids tend to discharge only at the portion directly above the outlet, and the
rest of material remains in the tank. These phenomena are called “bridging”. It is said that solids of its particle diameter larger than
1 mm do not cause bridging if the outlet diameter is at least 6 times as large as that of the particle.
notes for selecting a level sensor
• General
Level sensors are used in a wide range of applications. The measured material can be liquids, solids or bulk solids, and the
purpose of measurement can be detection of filled or discharged amount for business transactions, process monitoring or
control, or production or inventory management. Selecting a sensor most suitable for the measured material and the purpose of
measurement is necessary for successful level measurement.
Signal processing capability is one of the features that the user should care about to receive necessary information from the
sensor. Sensors can:
- have the local display only;
- come with a transmitter;
- are capable of calculating and processing the output signals, and converting them to signals for recording, warning or control.
Choosing the sensor best matching the purpose of measurement is important.
Prior to selecting a sensor, the user needs to consider what the material is, why it is to be measured, what is the required
information, and how the gained information is to be processed and used.
The following paragraphs include typical notes for selecting a level sensor.
(1) Material to be measured
The important factors regarding the measured material include the material type, its characteristics under the operating
conditions such as temperature, pressure, density, viscosity and dielectric constant. For solid materials, apparent density,
humidity, particle size and the angle of repose should also be taken into consideration. Additionally, corrosiveness, abradability,
inflamablilty and explosiveness and their levels should be clarified.
The state of material in the tank is another factor for successful sensor selection. Information such as whether the level is
stationary or changes slowly, the surface is with turbulence or vortex due to an agitator or by boiling, has to be checked. The type,
configurations and material of construction of the tank are also important.
If maintenance, service or replacement of the sensor with the tank in operation is required, such availability has to be checked.
If such work is required but the process does not allow it, sensors that can be isolated from the process will be the choice.
(2) Information to be obtained
The sensor model, needed functions and required accuracy level depend on the information required to be obtained using
the sensor. There are two types of level sensors, point level sensors and continuous level sensors. Use the former for warning
or switching control at a specified level, and the latter for measurement of filled, discharged or current amount of material, or for
process control.
The following items should be taken into account in selecting a sensor to use:
- application type such as liquid/solid level, interface of liquids or liquid and solid;
- whether the data are regarded as continuously monitored information gained using one controller and one sensor, or as
cyclically or intermittently monitored information gained using one controller and multiple sensors;
- required measurement accuracy.
(3) Usage of obtained information
The measured values can be used simply as a level value, or converted into volume, mass or other information. If conversion is
required, check how it should be done.
Also, check how the measured values should be displayed, that is, if it should be recorded, or graphically displayed, and also if
it is to be used for continuous or switching control, and if digital or analog transmission is required.
(4) Relation between the measured material and the sensor
Mounting location and method are important factors in terms of accuracy, error occurrence, failure ratio and maintenance.
Conditions of the mounting location such as temperature, if the unit is exposed to direct sunlight, vibration or corrosive materials,
and the zone number of the location should also be checked.
For food and beverage applications, sensors have to be of sanitary models, easily cleaned and without anything that can cause
material buildup. Give a thought to the location and conditions of inlet and outlet, and peripheral equipment or conveyer as well.
(5) Use in hazardous areas
Flameproof or intrinsically safe sensors are typically used in hazardous areas. Which to use depends on the zone classification
of the area. In Zone 0 areas, intrinsically safe sensors must be used. In Zone 1 and 2 areas, intrinsically safe or flameproof sensors
are required. Check which type of approval is required in your application before selecting a sensor.
3
NOHKEN INC. including Sanda factory have been certified to ISO9001 and JIS Z 9901
standards for quality system in 1998.
• Scope: Design, development, production and servicing of level sensor and related devices to measure and
control, except imported products.
• Certification: Japan Standard Association (JSA)
• Registration Number: JSAQ237
• Registration Date: January 23, 1998
We have been providing high quality products and attentive services to customers under the management
concept of “Customer Satisfaction”. Our Sanda factory, with the cleanest and systematic atmosphere,
provides following facilities to carry out quality control:
• Explosion-proof testing equipment
• Automatic plasma-welding robot
• Float pressure and leak tester
• Temperature and Humidity Chamber
• Vibration Tester
• Various electronic calibration instruments
4
CONTENTS
PAGE
Message from Management.......................................................1
PAGE
Powders - Point Level Detection
General Notes for Handling Level Sensor................................2-3
VL12, 22, 32 New Vibration Level Sensor........................97-98
ISO9001.......................................................................................4
VLS12, 22, 32 Separated Vibration Level Sensor..........99-100
Contents......................................................................................5
VL612, 622 & VL6200 Intrinsic Safety..........................101-102
Diagram....................................................................................6-8
VC Small Vibration Level Sensor..................................103-104
Selection Guide......................................................................9-10
VF Flat Face Vibration Level Sensor............................105-106
Conformity and Approval..........................................................11
VH High Sensitivity Vibration Level Sensor..................107-108
Comparison Table of Explosion-proof Standard.......................12
VM Vibration Level Sensor for small hopper................109-110
Liquids (Solids) - Continuous Level Measurement
CG300 New Capacitance Level Measurement...............13-16
CM Capacitive Level Measurement.................................17-20
MS Magnetostrictive Level Measurement........................21-26
LR Custom Continuous Level Sensor..............................27-30
PL Hydrostatic Pressure Level Monitor............................31-34
PLD Hydrostatic Pressure Level Monitor.........................35-38
PK Pressure Level Transmitter.........................................39-40
LA Air Bubble Level Measurement System.....................41-42
Liquids - Point Level Detection
FR20 & OLV20 Magnetic Float Level Sensor...................43-48
FR51 Explosion Proof Magnetic Float Level Sensor........49-50
OL, LS, SH, FH Miniature Liquid Level Sensor................51-54
FM Side Mounted Float Sensor........................................55-56
FS Wide Differential Float Sensor.....................................57-58
FC Cable Suspended Float Sensor with Reed Switch.....59-60
FT Cable Suspended Float Sensor with Micro Switch.....61-62
FQ Cable Suspended Float Sensor for Tumbling Action....63-64
FP Pneumatic Liquid Level Sensor..................................65-66
FE Electrode Level Sensor...............................................67-68
CE Cable Suspended Electrode Level Sensor................69-70
MT Electrical Conductivity Level Sensor..........................71-72
LZ Leakage Oil Sensor....................................................73-74
OX Optical Interface Sensor............................................75-76
VP Compact Type Vibration Level Sensor...................111-112
R7 Rotating Paddle Sensor..........................................113-114
RB Rotating Paddle Sensor.........................................115-116
MWS Microwave Point Sensor.....................................117-118
Solids - Flow Detection
AF10 Acoustical Flow Sensor......................................119-120
Control Unit
MP2000 Continuous Proportioning Controller..............121-122
RE7000 Relay Unit.......................................................123-124
Typical Applications
Beer.....................................................................................126
Cement................................................................................127
Iron & Steel...................................................................128-130
Plastics.........................................................................131-132
Sugar............................................................................133-134
Water treatment............................................................135-136
Garbage Incineration Plant..........................................137-138
Semiconductor Manufacturing Process..............................139
Thermal Power Plant...........................................................140
Biogas Plant.................................................................141-142
Supplementary Data
Flange Comparison Table...................................................143
NPT Thread and Ferrule......................................................144
R Thread (PT, BSPT)...........................................................145
Liquids and Powders - Point Level Detection
CG New Capacitance Point Level Sensor.......................77-78
KRV Capacitance Level Sensor for Universal Usage......79-80
KSV Capacitance Level Sensor for Conductive Medium....81-82
K series Specification......................................................83-88
KRE / KSD Intrinsic Safety Capacitance Level Sensor....89-92
Compact Type Capacitance Level Sensor......................93-94
KSV-9N Compact Capacitance Level Sensor..................95-96
G Thread (PF, BSPF)...........................................................146
Dielectric Constants............................................................147
Bulk Density........................................................................148
Explanation of "IP" Ratings..................................................149
Chemical Resistance Chart.........................................150-152
Abbreviated Explanations...................................................153
Philosophy of NOHKEN...........................................................154
This catalog was printed in 2013. Specifications and Products herein are subject to change at any time without any obligation the
part of the manufacturer to notify any person for such revisions or changes.
5
High Quality Level Sensor provides Better Solution.
A wide range of Level Instrumentation is now available from NOHKEN INC. to meet various process
requirements. This diagram is just a sample of our products line up.
Continuous Liquid Measurement
The industrial engineering has improved, and manufacturing and/or controlling systems have become very
sensitive and advanced. Accuracy, Reliability, and Quality are most important features, characteristics, and
specifications in product selection criteria of level sensor. Those heavy product selection criteria achieve to
safe and efficient operation.
We, NOHKEN INC., have over four decades of experience creating high performance products for
demanding such requirements. Our goal is to meet customer’s satisfaction with high quality instrumentation
that will make more safe and efficient operation. You can be assured that NOHKEN will promptly and properly
respond to your request. We would like to be your first selection of the company for level controls.
6
Liquid Point Detection
7
Solid Point Detection
8
SELECTION GUIDE
This flowchart is a sampling for the selection of the proper sensor.
Check detailed specifications of your sensor selecting.
9
10
CONFORMITY AND APPROVAL
To meet the technical regulations, laws, and
standards around the world, our products are
designed to meet following conformity and
approval.
1. Explosion Protection
Some of our products are certified in conjunction
with safety regulations for industrial electrical and
mechanical instruments by Research Institute of
Industrial Safety, designed by Japan Ministry of
Labor.
Flame proof construction
Model VL510 series
Model FR510 series
Model FP510 series
Model LR520 series
Intrinsically safe
Model KRE65 & KRE series
Model KSD & KSI series
Model CM series
Model MS650 series
Model VL600 series
2. NK
Model FM-11 is approved to suite ship building
regulation by Nippon Kaiji Kyokai who is a ship
classification company in Japan.
3. Hygienic standard
Following float sensors are certified in conformity
with standard of Food, Additives, etc. by Japan Food
Research Laboratories, authorized by the Japan
Ministry of Health and Welfare.
Model OLV-2P, Model OLV-2F, Model OLV-5 and
Model OLH-3
4. RoHS
We declare under our solo responsibility that the
following products are met RoHS directives
Model OLV-2A, Model OLV-2P, Model OLV-2F,
Model OLV-5, Model LS11P, Model LS11R,
Model LS12P, Model LS12R, Model OLV-20S/S6,
Model OLV-21S/S6, Model OLV-24S/S6,
Model OLV-25S/S6, Model OLV-26S/S6,
Model OLV-25P, Model OLV-25F2, Model FR20S/S6,
Model FR21S/S6, Model FR23S/S6,
Model FR24S/S6, Model FR25S/S6
(The products shall be without Housing Box.)
11
12
MODEL CG300
NEW CAPACITANCE LEVEL MEASURMENT
Features
• Easy operation, easy programming
• dK correction
• Improved buildup insensitivity
• High accuracy operation
• Suitable for a wide range of materials
• LCD for operation status indication
General Description
Model CG300 of integral type is designed
for continuous level measurement of liquids or
chemicals. This sensor adapts the principle of
phase detection and ensures the wide range
of sensitivity adjustment, insensitive to buildup,
and easy adjustment using digital signals. This
sensor can detect Kerosene and Water without
changing the circuit board. Model CG300 is not
affected by the resistance of buildup due to the
phase detection. However, if it is affected, CG300
automatically select reasonable data, and output
the signal correctly. When the medium inside of
tank is changed, CG300 automatically calculates
and output ZERO and SPAN values with one given
point adjusted.
13
Operational Description
The basic oscillator circuit is of the parallel
resonance circuit with L (coil) and C (capacitance
between the electrodes). The oscillation frequency
(f) of this circuit is: f=1/2π LC. The frequency
without material around the sensor (f1) is:
f1=1/2π LC, where C is the capacitance without
material around the sensor (ZORO point). With
material around the sensor, the capacitance
increases (C+ΔC), and the frequency (f2) is:
f2=1/2π L(C+ΔC), where C+ΔC is the capacitance
with material around the sensor (SPAN point). The
sensor detects the frequency change from f1, and
gives output (4 to 20mA) corresponding to the
change. With the incorporated microcomputer,
offset of output current and reversed output signals
for ZERO/SPAN points are also available.
Key Features and Benefits
• Dielectric constant compensation function
When the dielectric constant of medium changes,
the conventional products need re-adjustment
of Zero and Span points. Model CG300
automatically calculates and output Zero and
Span values with one given point adjusted.
• Wide range of measuring mediums
Successful operation for measured medium of 30
to 2000 pF
Example of medium
Name
Kerosene
Ammonia
Isobutyl Alcohl
Methyl Alcohol
Water
Dielectric Constants
2.8
15-25
18.7-31.7
33-56.6
48-80
14
Specifications
Model
Integral
Separation
Drawing
Type
Mounting
Supply Power
Power Consumption
Output Signal
Load Resistive
Operating
Housing
Temperature
Electrode
Maximum Pressure
Maximum Humidity
Sensitivity
Accuracy
Material
Housing
Electrode
Insulation tube
O-ring
Radiation fin
Maximum Probe Length
Cable Entry
Protection
Recommended cable
CG300N
CG300BN
CG300F
CG300BF
Standard
R1
JIS5K50A
100 to 240V AC ±10%, 50/60Hz
Integral type: Approx. 7VA Max., Separation type Approx. 6VA Max.
4 to 20mA DC
600 Ω Max.
-25 to 65˚C
-10 to 60˚C
100 kPa Max. (Except mounting part)
85% RH Max.
30 to 2000 pF
±0.5% F.S.
ADC12
304SS
PFA
FPM/FKM
4000mm
G3/4
Housing: IP65 / Electrode: IP68
Power supply: IV 2 x 2.0mm2 or CVV 2.0mm2 x 2C
Output signal / Between sensor and controller: CVV-S 1.25mm2 x 2C
*S1 and S2 on the drawing is blanking zone.
15
CG300NT
CG300BNT
CG300FT
CGM300BFT
Heat Proof
CGM1100
Controller
R1
JIS5K50A
100 to 240V AC ±10%, 50/60Hz
Integral type: Approx. 7VA Max., Separation type Approx. 6VA Max.
4 to 20mA DC
600 Ω Max.
-25 to 65˚C
-10 to 60˚C
-10 to 130˚C
100 kPa Max. (Except mounting part)
85% RH Max.
30 to 2000 pF
±0.5% F.S.
ADC12
SPCC
304SS
PFA
FPM/FKM
304SS
4000mm
G3/4
Housing: IP65 / Electrode: IP68
IP20
Separation distance 200m Max.
Power supply: IV 2 x 2.0mm2 or CVV 2.0mm2 x 2C
Output signal / Between sensor and controller: CVV-S 1.25mm2 x 2C
*S1 and S2 on the drawing is blanking zone.
16
CM SERIES
CAPACITIVE LEVEL MEASUREMENT
Features
• Wide range of application
• Measuring range up to 10 meter
Approval
i3aG5
General Description
The CM is designed for continuous level
measurement of up to 10 meter for liquids and
solids in containers. The remote controller can be
mounted up to 100 meter away from the sensor.
Use the CM series where non contact measurement
is unacceptable due to operating conditions such
as temperature, pressure, aggressive chemicals,
etc. Several models are differentiated by your
applications.
17
Operational Description
The metal wire or the metal probe inside of the
insulation tube constitutes a capacitor with the
metal container wall or the reference rod. The
capacitance of medium is converted into high
frequency voltage and current signal proportional to
the level.
Technical Note
• The specification of product shall be changed by
the application and operational condition.
• The connecting cable can not be shorten or
extended at site. The separation distance must
be informed when you order.
Specifications
Sensor
Model
Description
Application
Drawing
Mounting
Operating
Housing
Temperature Detection part
Maximum Pressure
Maximum Humidity
Sensitivity
Accuracy
Material
Housing
Detection part
Maximum Probe Length
Cable Entry
Protection
Controller
Model
Description
Supply Power
Power Consumption
Output Signal
Load Resistance
Operating Temperature
Maximum Humidity
Accuracy
Material
Cable Entry
Protection
Recommended Cable
CM-BN
CM-BF
Standard
Liquids / Solids
R1
CM-BPN
CM-BPF
Stilling tube
Liquids
JIS10K50A
R1
JIS10K50A
-10 to 55˚C
-10 to 130˚C
100 kPa
85% RH
30 to 2000 pF
±3% F.S.
AC or ADC12
304SS + FEP tube
10000mm
4000mm
G1/2
IP65
CM-A
Wall mounting
CM-YL
Wire
Solids
JIS5K50A
500 kPa
304SS
10000mm
CM-A6
Wall and Panel mounting
100/200V AC, 110/220V AC±5% 50/60Hz
Approx. 10VA Max
Approx. 6VA Max.
4 to 20mA DC
600 Ω Max.
-10 to 50˚C
85% RH
±3% F.S.
AC
Steel and Acryl resin
4-G1/2, G1/4
IP54
IP10
TXE (double shield co-axial cable)
18
Controller
Model
Description
Supply Power
Power Consumption
Output Signal
Load Resistance
Operating Temperature
Maximum Humidity
Accuracy
Material
Protection
Recommended Cable
Mounting
19
CM3000
Controller for CM300
100/200V, 110/220,
120/240 AC±5% 50/60Hz
Approx. 4VA Max.
CM7000
Controller for CM700
100, 110, 120, 200, 220,
240V AC±5% 50/60Hz, 24V DC
Approx. 4VA or 2.4W Max.
4 to 20mA DC
600 Ω Max.
-10 to 50˚C
-10 to 40˚C
85% RH
±3% F.S.
SPCC (Steel Structure)
Phenolic
IP10
CVVS (3-core cable)
2 x dia. 4.5 holes (Pitch 175)
2 x dia. 4.5 holes (Pitch 40)
20
MODEL MS
MAGNETOSTRICTIVE LEVEL MEASUREMENT
Features
• High Accuracy: ±1mm or 0.1% F.S. for SS float
±2mm or 0.2% F.S. for PVC float
• 4 to 20mA output
• Works in a wide range of liquids
Approval
Ex ia II CT5
General Description
The MS series, magnetostrictive level
measurement, is especially designed for precise
measurement. With its high accuracy of ±1mm
or ±0.1% F.S. for SS float and ±2mm or ±0.2%
F.S. for PVC float, the MS is ideal for continuous
level monitoring for beer and other beverages,
pharmaceuticals, etc.
We recommend connecting with power unit of
PU2000 for stable operation.
Technical Note
The safety barrier must be connected between
sensor and controller for Intrinsically Safe.
MTL722+ (Cooper Industries plc) is recommended,
prepared in locally.
21
Operational Description
The MS series consists of a magnetostrictive wire
① in the stem ② and a permanent magnet inside
the float ③ . The float is the only moving part which
travels vertically on the stem. Once a pulse current
④ is induced from the end of the magnetostrictive
wire, a tubular magnetic field emanates ⑤ . As
the float travels, torsional vibration ⑥ is launched
by the interaction between the float magnetic field
and the magnetostrictive wire. The float position is
determined by measuring the lapse of time ⑦ from
the inducing of a pulse current to the return of the
torsional vibration to the pick-up (⑧).
Specifications
22
23
24
MODEL MS700/800
MAGNETOSTRICTIVE LEVEL
MEASUREMENT
Features
• High Accuracy: ±1mm for SS float
• 4 to 20mA output
• Compact design for small tank
General Description
The small type of MS series, magnetostrictive
level measurement, is especially designed for
precise measurement in small tank. With its high
accuracy of ±1mm, the MS is ideal for continuous
level monitoring of storage or blending tank in
beverage, pharmaceutical or other application.
The separation type of MS700 and integral type of
MS800 are available.
Operational Description
The MS series consists of a magnetostrictive wire
① in the stem ② and a permanent magnet inside
the float ③ . The float is the only moving part which
travels vertically on the stem. Once a pulse current
④ is induced from the end of the magnetostrictive
wire, a tubular magnetic field emanates ⑤ . As
the float travels, torsional vibration ⑥ is launched
by the interaction between the float magnetic field
and the magnetostrictive wire. The float position is
determined by measuring the lapse of time ⑦ from
the inducing of a pulse current to the return of the
torsional vibration to the pick-up (⑧).
25
Specifications
Sensor
Model
Description
Drawing
Mounting
Supply Power
Output Signal
Load Resistive
Operating
Housing
Temperature Wetted part
Maximum Pressure
Maximum Humidity
Minimum Specific Gravity
Accuracy
Material
Housing
Flange Stem
Float
Maximum Length of Stem
Minimum Length of S1
Minimum Length of S2
Cable Entry
Protection
Recommended Cable
Controller
Model
Drawing
Supply Power
Power Consumption
Output Signal
Load Resistance
Power Source
Operating Temperature
Maximum Humidity
Accuracy
Material
Protection
Mounting
MS700S
Separation
MS800S
Integral
G1"
Supplied from MS3500
24V DC ±10% 50mA Max.
4 to 20mA DC
See fig. 1
-10 to 50˚C
-10 to 50˚C
-10 to 80˚C
-10 to 80˚C
2 MPa Max. (Except mounting part)
95%RH Max.
85%RH Max.
0.8
±1mm
304SS
304SS
316SSL
1000mm
36mm (Include plug thickness)
30mm
G1/2
IP65
3C2V (Coaxial cable)
MVVS (3-core shielded cable)
MS3500
100 to 240V AC ±10%, 50/60Hz
Approx. 5VA Max. (240V AC)
4 to 20mA DC
600 Ω Max.
15V DC
-10 to 60˚C
85% RH Max.
±1mm
PC/PET
Non Drip-proof
DIN rail 35 or 2×M3 screw mounting
26
MODEL LR
CUSTOM CONTINUOUS LEVEL SENSOR
Features
• Continuous level indication
• 4 to 20mA output
• Very reliable
• Wide choice of materials
• Durable float
Approval
d2G4
General Description
The LR series, custom continuous level sensors,
are designed to meet customer’s requirements
for reliable operation. Models are available in
lengths up to 3900mm with a variety of mounting
configurations. The wide selection of materials
include 304SS, 316SS, PVC, CPVC, PP, and others.
For stable operation, we recommend using with our
controller of Model MP2000 or CU2000.
Operational Description
The LR series consists of the reed switch and
resistor on the PCB inside the stem and permanent
magnet inside the float. The float is the only
moving part which travels vertically on the stem.
A permanent magnet inside the float acts on a
series of closely set reed switches and resistors
on the PCB inside the stem. The reed switches
are actuated by the float magnetic field in a “2-32 at a time" as the float travels. Accordingly, the
total resistance value of PCB is changed by float
traveling. The total resistance value is converted
into voltage and current signals in proportion to the
level of the liquid.
27
Interface Monitor
Model LR series float transmitters can monitor
the interface between two immiscible liquids. A
minimum specific gravity difference of 0.1 can be
accommodated. The weight and buoyancy of the
magnetic float will be adjusted so that the float sinks
through the lighter liquid and rides on the heavier
liquid. This option can be provided if the following
conditions are met:
1. Float material is 316 stainless steel
2. Minimum specific gravity difference is 0.1
3. Liquids have a specific gravity of 0.6 or greater
Volume Monitor
The control unit, MP2000-2, is provided with the
function of volume conversion selected from seven
common tank shapes as mentioned below.
• Horizontal cylinder with flat ends
• Horizontal cylinder with parabolic end
• Spherical tank
• Cylinder tank with cone bottom
• Cylinder tank with parabolic bottom
• Vertical round tank with flat bottom
• Vertical square tank with flat bottom
Ordering Information
28
Specifications
29
Wiring
MP2000
CU2000
30
MODEL PL
HYDROSTATIC PRESSURE LEVEL MONITOR
Features
• High accuracy and repeatability
• Protected against lightning surge
• Humidity/Dew immunity
• Minimal temperature error
• Diaphragm protection
General Description
The PL series, hydrostatic liquid level monitor,
is comprised of a sensor and converter. This
combination allows measuring of depth up to 100
meter. The PL series are ideal for use in water
reservoirs, rivers, dams, deep wells, water gates,
and deep tanks.
Operational Description
The sensor converts liquid pressure into
current signals proportional to the liquid level. A
semiconductor transducer containing silicon oil and
a Hastelloy C-22 sealing diaphragm is employed
to achieve accuracy and durability. In order to
compensate for atmospheric pressure the cable
contains a hollow “breathing” tube. Internal circuit
is fully potted to provide immunity from humidity and
condensation.
An integrated lightning arrestor protects the
sensor from damage caused by lightning surges
and storm activity.
31
Advantages
1. Protected against lightning surge
Model PL is provided with integral lightning
arrester and surge absorber to protect against
lightning surge.
2. Humidity/Dew immunity
Internal circuit is fully potted to avoid humidity or
dew.
Surge Protection
To protect the PL from damage caused by
lightning or electrical surges, the shield of the cable
shall not be grounded. The shield wire in the cable
is internally connected with the transducer housing.
Thus, without any external grounding, the shield
wire is already grounded through the water and the
grounded tank.
When lightning struck to the cable, the large
electric current flows from the shield wire to the
ground through the housing, the water and the
tank. This induced current may generate differential
voltage between the positive and the negative
signal wire or between the signal wire and the
housing. The Zener Diode should suppress it and
the Button Arrester should discharge it by flashing
to change it into light energy.
Custom Variations
• Hypalon cable for corrosive liquids
• Terminal box for easy installation and wiring
• Rigid stainless steel pipe for turbulent or fast
stream application
Technical Note
Do not connect to loop power system. The supply
power on the loop power may be decreased, and
PL may be malfunctioned.
Open angle control of the rever gate
(The PL is in the stilling tube)
Deep well monitoring with
Terminal box
Flange mounting for indoor tank
32
Specifications
Sensor
Model
Description
Drawing
PL892
2-wire
PL300
Deep well
Measuring Range
0-4m, 0-10m, 0-35m, 0-100m
0-50m, 0-100m
Supply Power
14 to 30V DC
12VDC
Output
4 to 20mA DC
Load Resistance
500 Ω Max.
300 Ω Max.
Operating Temperature
0 to 50˚C
Accuracy
±0.5% F.S.
Lightning Protection
12kV (1.2/50us)
Material
Housing
Body
304SS
Diaphragm
Hastelloy C-22
630SS
Cable*
PE, PVC, CSM
PVC
Flange
Mounting
Cable Entry
G3/4
Protection Housing
IP53
Body
IP68
IP68
Cable Length
15m (100m Max.)
50m
PL410
Integral
0-4m, 0-10m
11 to 34V DC
650 Ω Max.
± χ% F.S. (See below formula)
ADC12
Hastelloy C-22
304SS
JIS5K50A
G3/4
IP53
IP68
-
χ= √ [0.5×Maximum measuring range (m)/Measuring length (m)]2+0.52
Converter
Model
Drawing
Supply Power
Power Source
Power Consumption
Output
Load Resistance
Operating Temperature
Material
Cable Entry
Protection
Connected sensor
33
PL8500
PL2000
100 to 240V AC ±10%, 50/60Hz
24V DC
Approx. 5VA Max.
4 to 20mA DC
600 Ω Max.
0 to 50˚C
ADC12
2-G1/2
1-JIS F 15a (G1/2)
IP20
PL892
90 to 132/180 to 264V AC, 50/60Hz
20V DC
Approx. 2VA Max.
4 to 20mA DC
600 Ω Max.
0 to 50˚C
ABS
PL892, PL300
Application
Water Level Monitor at Dam
Differencial Level Monitor at Reservoir
DA8500
90 to 132/180 to 264V AC, 50/60Hz
24V DC
Approx. 4VA Max.
0 to 5V DC
-10 to 50˚C
SPC
IP20
L892
34
MODEL PLD
HYDROSTATIC PRESSURE LEVEL MONITOR
Features
• High accuracy by digital compensation
• Protected against lightning surge
• Body of sensor is interchangeable
General Description
The PLD series, hydrostatic liquid level monitor,
is comprised of a sensor and converter. This
combination allows measuring of depth up to 100
meter. The PLD series are ideal for use in water
reservoirs, rivers, dams, deep wells, water gates,
and tanks. The body of PLD is interchangeable.
When the sensor is damaged by direct lightning,
it can be easily replaced at site. Moreover, the
replacement cost can be saved by using existing
cable.
Operational Description
The sensor converts liquid pressure into
current signals proportional to the liquid level.
A semiconductor transducer and a Hastelloy
C-22 diaphragm for PLD120 series and FPM/
FKM diaphragm for PLD420 series are employed
to achieve accuracy and durability. In order to
compensate for atmospheric pressure the cable
contains a hollow “breathing” tube. Internal circuit
is fully potted to provide immunity from humidity and
condensation.
An integrated lightning arrestor protects the
sensor from damage caused by lightning surges
and storm activity.
35
Advantages
1. Protected against lightning surge
Model PLD is provided with integral lightning
arrester and surge absorber to protect against
lightning surge.
2. Humidity/Dew immunity
Internal circuit is fully potted to avoid humidity or
dew.
Surge Protection
To protect the PLD from damage caused by
lightning or electrical surges, the shield of the cable
shall not be grounded. The shield wire in the cable
is internally connected with the transducer housing.
Thus, without any external grounding, the shield
wire is already grounded through the water and the
grounded tank.
When lightning struck to the cable, the large
electric current flows from the shield wire to the
ground through the housing, the water and the
tank. This induced current may generate differential
voltage between the positive and the negative
signal wire or between the positive and the negative
signal wire or between the signal wire and the
housing. The Zener Diode should suppress it and
the Button Arrester should discharge it by flashing
to change it into light energy.
Technical Note
Do not connect to loop power system. The supply
power on the loop power may be decreased, and
PLD may be malfunctioned.
Open angle control of the rever gate
Deep well monitoring with
Terminal box
Flange mounting for indoor tank
36
Specifications
Model
Description
Drawing
PLD120
Standard
PLD130
High Accuracy
PLD420/PLD4300*
Waste water
Measuring Range
4m, 10m, 35m, 100m
4m, 10m
Supply Power
14 to 30V DC
Output
4 to 20mA DC
Operating Temperature
0 to 50˚C
Accuracy
±0.2% F.S.
±0.1% F.S.
Lightning Protection
13kV (1.2/50us), 6.5kA (8/20μs)
Material Body
316SS
Diaphragm
Hastelloy C-22
Cable
PVC
Weight
Protection
IP68
Cable Length
15 meter (100m Max.)
1km Max.
Separation distance
*PLD420 and PLD430 need junction box of PLD4300.
Converter
Model
Drawing
Supply Power
Power Source
Power Consumption
Input
Output
Amplification
Load Resistance
Operating Temperature
Protection
Material
Mounting
Connected sensor
37
PL2500
4m, 10m, 35m, 100m
18 to 26V DC
±0.2% F.S.
FPM/FKM
304SS, 3kg
100m Max.
PL2510
85 to 264V AC, 50/60Hz
24V DC ± 10%
24V DC
Approx. 3VA (at 20mA output)
Approx. 3VA (at 20mA output)
4 to 20mA DC (2-wire)
4 to 20mA DC
1 to 5 times
550 Ω Max.
-10 to 50˚C
PBT
35mm DIN rail
PLD120, PLD130
PLD430/PL4300*
High Accuracy for Waste Water
PLD120-11-□02
Munhall Pump
4m, 10m
4m, 10m
18 to 26V DC
14 to 30V DC
4 to 20mA DC (Resistive)
0 to 50˚C
±0.1% F.S.
±0.2% F.S.
13kV (1.2/50us), 6.5kA (8/20μs)
316SS
FPM/FKM
Hastelloy C-22
PVC
304SS, 3kg
IP68
15 meter (100m Max.)
100m Max
1km Max.
PL1100
100 to 240V AC, 50/60Hz
24V DC
Approx. 20VA
4 to 20mA DC (2-wire)
4 to 20mA DC
600 Ω Max.
0 to 50˚C
IP20
SPCC
2×M6 screw mounting
PLD120-11-□02
38
MODEL PK
PRESSURE LEVEL TRANSMITTER
Features
◦ Flat face to avoid residual liquid
◦ Plastic flange to achieve light weigh
◦ Wide variety of flange materials to suit specific
application
◦ No need for Teflon film sheet due to the plastic
flange of high corrosive resistance
◦ Easy start-up with no adjustment or setting
General Description
Model PK series, pressure level transmitter, is
integral type of continuous liquid transmitter. The
measuring depth is selected by 0 to 4m or 0 to 10m.
The material of flange is available with PP, PVC,
CPVC, 304SS, and 316SS to suit many of specific
application such as waste water, chemical, purified
water, and so on. Model PL2500 is available to
connect with PK series to supply 24V DC power.
39
Operational Description
The diaphragm at the center of flange, FPM/FKM
for plastic flanges and Hastelloy C-22 for metal
flanges, detects the liquid pressure in proportional
to the liquid level. The semiconductor pressure
sensor converts the pressure into current signal,
and outputs 4 to 20mA DC. In order to compensate
for atmospheric pressure, the housing has a vent to
automatically correct the detection errors caused by
the change in atmospheric pressure.
Specifications
Model
Description
Drawing
PK120S
Mounting
Measuring Range
Supply Power
Output
Load Resistive
Operating
Detection Face
Temperature Housing
Accuracy
Material
Flange
Diaphragm
Housing
Cable Entry
Protection
Housing
Wetted part
Connected Converter
Converter
Model
Drawing
Supply Power
Power Source
Power Consumption
Input
Output
Amplification
Load Resistance
Operating Temperature
Material
Mounting
PK120S6
PK120P
2-wire
PK120HV
2-wire
JIS10K50A
JIS10K50A Equivalent
4m, 10m
24V DC ±10%
4 to 20mA DC
500 Ω Max.
0 to 70˚C
0 to 50˚C
±0.5% F.S.
316SS
PP
304SS
PK120V
316LSS
PVC
FPM/FKM
CPVC
PVC
G3/4 equivalent
IP65
IP68
PL2500, MP2000
PL2500
MP2000
85 to 264V AC, 50/60Hz
24V DC
Approx. 3VA (at 20mA output)
4 to 20mA DC (2-wire)
4 to 20mA DC
1 to 5 times
550 Ω Max.
-10 to 50˚C
PBT
35mm DIN rail
100 to 240V AC ±10% 50/60Hz
24V DC
Approx. 20VA Max.
4 to 20mA DC
4 to 20mA DC
600 Ω Max.
-5 to 50˚C
ABS
Panel mounting, In conjunction with DIN43
700-96×96 (Panel cut-out: 92mm×92mm)
40
MODEL LA
AIR BUBBLER LEVEL MEASUREMENT SYSTEM
Features
• Can be used with highly viscous liquids
• 4 to 20mA output
• On site or remote displays
• Easy maintenance
• No moving parts
Application
The LA is ideal for measuring drainage, night soil
or sewage water with high viscosity and suspended
solids.
General Description
The LA series air bubbler is simple and proven
level measurement system for dirty wastewater
treatment. The bubble tube is the only component
in contact with the liquids.
The control unit consists of pressure elements, a
needle valve, V/I converter and indicator. Even if
sludge or suspended solids become clogged in the
bubble tube, they can be blown out by operating
the bypass valve. There are two kinds of bubble
tube, an easily installed flexible PVC hose and a
304SS pipe which can withstand high temperature.
The LA is ideal for measuring drainage, night
soil or sewage water with high viscosity and/or
suspended solids.
Operational Description
The LA system operates by bubbling a small
flow of air from a submerged dip tube and then
measuring the resulting air back pressure. Pressure
increases proportion to depth of measured liquid
until air is forced out the bottom. At this point,
pressure stabilizes and the pressure is measured by
the control unit. The pressure signal is converted to
4-20mA DC output. The field indicator is provided
by the converter.
41
Specifications
42
MODEL FR20 & OLV-20
MAGNETIC FLOAT
LEVEL SENSOR
Operational Description
These level sensors contain hermetically sealed
reed switches in the stem and a permanent magnet
in the float. As a float rises or falls with the level of
liquid, the reed switch activates by the magnet in the
float.
Applications
The FR20 and OLV-20 have numerous industrial,
machinery and process control applications that
include some of the following:
Control
In processing petrochemicals, iron, steels,
chemicals and food
Original Equipment Manufacturing
As a reliable component in boilers, hydraulic
equipment, air conditioners, etc
Semiconductor Manufacturing
As a non-contaminating pump control for pure
water
Automatic Planting Machinery
As a level control in corrosive plated environments
Features
• Custom manufactured to user specifications
• Switch points are field-adjustable (FR series)
• Reliable
• Wide choice of materials
• Long switch life
• Durable float
General Description
The FR20 and OLV-20 custom level sensors are
engineered and manufactured to meet demanding
customer applications for liquid level sensing.
Available in a wide range materials and mounting
types, these sensors are appropriate in most
liquids. The FR20 series is available in lengths up to
3900mm with a variety of mounting configurations.
The OLV-20 series is physically smaller and has a
maximum total length of 500mm.
Interface of two immiscible liquids can be
detected by FR series. The difference of SG is
required more than 0.1 for SS float, 0.2 for plastic
float.
43
Selecting the Correct Series
The FR20 series offer a wide range of choices
in floats, mounting configurations, materials, and
number of switch points, while the OLV-20 series
offer smaller dimensions, shorter maximum length
and lower cost.
1. Determine whether an FR20 or OLV-20 series are
required.
2. Select the required material for the stem and
floats.
3. Select the required mounting type.
4. Determine the number of actuation levels
required.
5. Determine where the actuating levels should be.
Distances are measured from the inner surface of
the mounting to the end of the stem.
6. Determine switch operation - normally opened (up
ON, down OFF) or normally closed (up OFF, down
ON).
Conformity and Approval
CE (Low Voltage Directive)
The FR20 and OLV-20 series without housing is in
conformity of EN61010-1: 2nd edition (2001).
RoHS Directive
The FR20 and OLV-20 series with material of
304SS, 316SS, and 316LSS, but without housing,
can be in conformity of RoHS Directive.
NK (Marine Approval)
The FR20 and OLV-20 series are approved to
suite ship building regulation by Nippon Kaiji
Kyokai who is a ship classification foundation in
Japan, but limited application.
Ordering Information
Ordering Information
44
Specification
FR20 Series Float Types
45
Switch Rating
Max. Capacity
Max. Current
Max. Voltage
15VA reed switch
15VA
15W
1A AC
1A DC
264V AC
200V DC
220VA reed switch
220VA
55W
1A AC
0.5A DC
220V AC
110V DC
46
Specification
OLV-20 Series Float Type
47
Switch Rating
Max. Capacity
Max. Current
Max. Voltage
50VA
0.5A AC
300V AC
50W
0.5A DC
300V DC
48
MODEL FR51□
EXPLOSION PROOF MAGNETIC
FLOAT LEVEL SENSOR
General Description
The FR51 □ series are made specifically for point
level detection of flammable liquids in containers.
This series are approved as flameproof construction
(d2G4) by Technical Institute of Industrial Safety
(TIIS), Japanese Ministry of Labor.
Available in a wide variety of materials and
mounting types, the FR51 □ series are appropriate
for use in flammable liquids.
The FR51 □ series features a reliable, accurate
mode of operation. The stem contains a
hermetically sealed reed switch; the float rises or
falls with the level of the liquid, the reed switch is
activated by the permanent magnet inside of float.
Ordering Information
Features
• Custom made to user specifications
• Flameproof as d2G4 by TIIS
• Wide variety of materials
• Up to 5 switch points
49
Specifications
FR51 Series Float Types
Switch Rating
Max. Capacity
Max. Current
Max. Voltage
110VA
0.5A AC
220V AC
33W
0.3A DC
110V DC
50
MODEL OL, LS, SH, FH
Features
• Compact size
• Low cost
• Reliability/long switch life
• Can be used in a wide range of liquids
• Perfect solution for standard assembly parts of
mass-produced equipment
General Description
These miniature liquid level sensors are designed
for reliable operation in small tanks and containers.
Their rugged design and careful engineering make
them the perfect solution for OEM and large volume
applications.
Operational Description
These level sensors contain hermetically sealed
reed switches in the stem and a permanent magnet
in the float. As the float rises or falls with the level of
the liquid, the reed switch activates by the magnet
in the float. The operation of the switch, normally
open or normally close, is easily changed by
removing a retainer and inverting the float.
51
MINIATURE LIQUID
LEVEL SENSOR
Conformity
Hygienic standards of Food, additives, etc. by
Japan Food Research Laboratories, see the page 6
for details.
Some of sensors are conformed by RoHS
directive. Six materials such as Lead, Mercury,
Hexavalent Chromium, Polybrominated Biphenyls,
Polybrominated Diphenyl Ethers, and Cadmium are
not contained to these products.
Applications
Typical applications include automatic vending
machines, photocopiers, small collection tanks,
miniature pumping stations, pilot plants and similar
small-system applications.
• Controlling delivery of plating liquid
Nickel plating liquid is used for surface treatment
of electronic parts. The liquid is automatically fed
into a plating bath with the OLV-2P detecting the
upper and lower levels.
• Coffee extraction control
The OLV-5UN is mounted in the feeding water
tank to detect the lower limit of the hot water. The
OLV-5UN is suitable for food and pharmaceutical
applications because the float joints are plasma
welded and the surface is buffed smooth.
• Hot water control
The high temperature version of OLV-5 is the
perfect solution for automatic water boiler tank to
keep it always full. The wetted parts of OLV-5 are
316LSS float and 316SS stem/retainer, and it can
withstand up to 120˚C.
Switch Rating (Max. Resistive Load)
Product Summary
OLV-2A: Designed for water applications.
OLV-2P: Use in chemicals, food and portable water.
OLV-2F: Designed for applications involving
corrosive chemicals and solvents.
OLH-3: Use in water only, horizontal mounting,
O-ring seal provided.
OLH-10: Use in chemicals, food and potable water,
horizontal mounting.
LS1 □ P: Suitable for standard assembly parts of
mass-produced water application equipment.
LS1 □ R: Suitable for standard assembly parts
of mass-produced lubricating and hydraulic oil
applications equipment.
OLV-5 & OLV-5UN: Use in most of liquids.
28×27mm plasma-welded 316LSS float with 316SS
stem.
OLV-5UN is a UL recognized component.
FH30 & FH50: Continuous operation at 120˚C
for FH30 and at 200˚C for FH50. Both models
withstand steam cleaning and sterilization.
SH10: Horizontal mounting from outside container.
316 stainless steel construction.
OLV-25S/90: Horizontal mounting from inside
container.
Protection For Electrical Surges:
1. Over voltage
Reed switches are not designed for the direct
switching of inductive loads such as motors,
contactors, solenoid valves, and so on. They are
susceptible to damage from over voltage. DO
NOT EXCEED THE CONTACT RATINGS. Contact
should be wired to miniature relays, suppressors
or similar devices. We recommend the use of our
relay unit model RE7000.
2. Over current
The switching lamps or stray capacity from long
cable length may produce surge current, and the
reed switch may be welded. Contact should be
wired to our relay unit model RE7000.
Technical Notes
1. The sealing compound over the lead wire egress
will keep moisture, but is insufficient to prevent
water penetration. Please install in good location
or apply suitable sealant.
2. If there is surface wave motion, use a time-delay
relay to dampen the switch action.
3. The switch should be located away from strong
magnetic fields such as those produced by
motors or solenoid values.
4. Max. Allowable impact is 10G. Shocks greater
than 10G may damage the switch.
5. Max. Pull load of lead wire is 19.6N. Exceeded
pulling during installation may damage the switch.
52
Specifications
53
54
MODEL FM, HM
Features
• Simple installation
• Durable Float
• Stainless steel construction
• Reliability/Long switch life
Approval
FM-11 is approved by NK (Japanese marine
engineering classification), Approval No. 97 FV
705B. The specifications are the same except the
maximum switch rating, 50VA 0.5A 240V AC or 50W
0.5A 240V DC.
Specification
Model
Description
Drawing
Mounting
Switch Rating
Operating Temperature
Maximum Pressure
Material Mounting
Shaft and Float
Housing
Cable Entry
Protection
Minimum S.G.
Life Expectancy
55
FM-11
Standard
SIDE-MOUNTED FLOAT SENSOR
General Description
The FM series, side-mounted level sensors, are
manufactured specifically for level detection in
clean liquids such as oils, water and chemicals.
They are designed for horizontal mounting in a tank
or vessel through flanged or threaded connections.
To suit many different level sensing situations, a
wide variety models are available.
FM-12
Double contact
JIS5K40A
50VA 0.5A 300V AC, 50W 0.5A 300V DC Max. (Resistive)
-10 to 120˚C
2.5 MPa
304SS
316SS
ADC12
G3/4
IP44
0.7
1×107 Min. Operation
Operational Description
The FM series contain a hermetically sealed reed
switch within the stem or flange and a permanent
magnet in the end of the shaft. As the float rises or
falls with the liquid level, the magnet activates the
reed switch. Changing the mounting orientation can
reverse switch action. They work well as high or low
level alarm or control for light-duty applications.
The FM series can be used in any non-hazardous
tanks or vessels. However they can be used in
hazardous location by connecting with intrinsic
safety barriers. (Local approval for the combination
system use of Intrinsic Safety standard is required.)
Technical Note
To protect the reed switch against electrical
surges, we recommend the use of our relay unit
model RE7000. Please see the RE for details.
Switching Level
FM-14
Long stem
FM-16
Interface detection
HM-10
Micro switch
R1-1/2
JIS5K40A
50VA 0.5A 300V AC, 50W 0.5A 3 00V DC Max. (Resistive)
-10 to 120˚C
-10 to 80˚C
2.5 MPa
304SS
316SS
ADC12
G3/4
IP44
0.7
0.72 to 1.0*
1×107 Min. Operation
*Middle S.G. of two liquids, the difference of SG is recommended more than 0.2.
200
14
32
(104)
(23)
4-φ15
Holes
A
(56)
φ155
Max. 140
φ64
120
φ130
FM-13
Thread mounting
JIS5K65A
-10 to 120˚C
3 MPa
304SS
316SS, Epoxy resin
ADC12
0.65
1×105 Min. Operation
56
MODEL FS
WIDE DIFFERENTIAL FLOAT SENSOR
General Description
The Model FS is a simple float sensor designed
for top mounting in open tanks or vessels. The FS
can be installed by bulkhead, screw-in or flange
mounting. Control range is adjustable from 60mm
to 1500mm. This sensor is designed for use as
a reliable component in hydraulic units, boilers,
magnetic cooling equipment, irrigation systems,
etc. The model FS is an economical solution for
emptying and filling control.
Operational Description
The model FS consists of a micro-switch operated
by a vertical rod and float mechanism. The float
freely moves between upper and lower stoppers
which are fixed on the rod at the customer’s
requested points. As the liquid level rises, the float
moves up until it reaches to the upper stopper. The
rod will then be pushed up by the buoyancy of
float, and the micro switch will be operated. When
the liquid level falls, the float moves down until it
reaches to the lower stopper. Then the rod will
be fallen down by the weight of the float, and the
micro switch operation will be reversed. A spring
mechanism attached to the rod is designed to
provide mechanical hysteresis. During the float
traveling on the rod, the operating state of micro
switch is held until the float reaches the upper or
lower stoppers.
The stoppers on the rod can be adjusted to obtain
desired switching range, and the 5A rated, singlepole, double-throws switch makes the model FS
suitable for either empty or full operations.
Features
• Direct pump control
• Adjustable ON/OFF switching levels
• Unaffected by magnetic fields
• Simple installation
57
Installation Notes
Installation of the model FS is extremely simple
and easily accomplished. When installing the
switch, the following points should be noted:
1. The spring operation tension is factory set, but
may require adjustment on site, especially if the
length of the operating rod is changed. Correct
operation should be checked and the spring
tension adjusted if necessary.
2. It is important that the shaft and rod be mounted
so that their axis is truly vertical.
Specification
Model
Drawing
FS-2S
Application
Open Tank
Mounting
Equivalent JIS5K50A t=2
Contact rating
1 SPDT, 250V 5A AC, 125V 0.6A DC (Resistive)
Operating
Housing
0 to 55˚C
Temperature
Wetted parts
0 to 80˚C
Life expectancy
4×105 Operations
Material
Float
304SS
Rod
304SS
Stopper
304SS
Flange
304SS
Bellows
Neoprene (Option: Silicon)
Housing
Phenol (Cover: Polypropylene)
Cable Entry
G3/4
Protection
IP42
Minimum S.G.
0.85
Operating differential
*60mm to 850mm (at L=1000mm)
*The maximum hysteresis is 60mm, when the float is fixed by two stoppers.
Ordering Information
58
MODEL FC
CABLE SUSPENDED FLOAT SENSOR
Features
• Usable in corrosive liquids
• Mounts in limited overhead space
• Stable in turbulent liquids
• Adjustable switch points
• Reliability/Long switch life
General Description
The FC series guard floats are designed for use
in applications where the actuation level is too deep
for our model FR (Max. 3.9 meter), where overhead
space is limited, or where there is surface wave
motion. The PVC or Polypropylene float and SCM
cable are compatible with a wide range of corrosive
liquids. The float is protected from turbulence and
motion by a PVC guard. The switch operating levels
are easily adjusted by altering the height of the
cable fixing point. The switch operations, NO or
NC, are easily changed by inverting the float.
A number of float units can be used together
to give multiple level switch points in one flanged
holder. Each float can be easily assembled on site
and the switch operating points are adjusted by
desired length of cable.
59
Operational Description
The FC consists of a float on a stem with a reed
switch inside the stem. As the float rises or falls with
the level of the liquid, the reed switch is activated by
a permanent magnet in the float.
Technical Note
To avoid personal injury and protect the switch for
electrical surges, connect the float to our relay unit
Model RE7000 or similar devices.
Specifications
Contact Rating
60
MODEL FT
CABLE SUSPENDED FLOAT SENSOR
Features
• Usable in a wide range of liquids
• Available NO or NC contacts
• Adjustable switch points
• Reliable/Long switch life
• Easy installation
General Description
The FT series cable suspended float sensors
are designed for high or low level indication. The
FT series are miniature switch actuated design
ideally suited to operate pumps, valves and similar
equipment used in the sewage or municipal
wastewater treatment plant. A high capacity micro
switch in the ABS float provides a reliable long life
level control.
A number of float units can be used together
to give multiple level switch points in one flanged
holder. Each float can be easily assembled on site
and the switch operating points are adjusted by
altering the length of the cable.
Operational Description
The buoyant float is weighted on one side. As
the liquid rises, it tilts in a fixed direction to operate
the micro switch, which uses a movable iron ball to
actuate the switch.
61
Chemical Resistance
The ABS covered float and PVC cable are
compatible with a wide range of liquids. However,
there are some liquids that may damage these
materials.
ABS can be quickly damaged by the following
liquids:
• Aromatics (benzene, toluene, xylene) cause the
float to dissolve.
• Esters and ketones cause the float to swell.
PVC cable can be used with the following
cautions:
• Oils, especially vegetable oils and fats, tend to
absorb the plasticizer of PVC cable. Consequently
the cable stiffens.
If necessary, alternative SCM cable is available
with FT-3A and FT-3B. In general, the resistibility
depends on concentration, duration of immersion,
presence of suspended solids and/or corrosive
gasses and temperature. Although these cable
suspended floats are designed for long life, we
recommend that they are replaced at adequate
intervals.
Technical Notes
• The FT-3 is ideal for direct pump control, with 2A
250V AC switch rating. For PLC and DCS usage,
we recommend to use the FT-2, with 0.1A 125V
AC rating.
• SCM cable is available with FT-3A and FT-3B.
• To avoid personal injury and protect the switch for
electrical surges, connect the float to our relay unit
Model RE7000 or similar devices.
Ordering Information
Specifications
Model
Drawing
FT-2
FT-3
FT-5*1
FT-7*1
FT22/FT33/FT55/FT77
Operation Characteristic
-10 to 50˚C
Operating Temperature
Maximum Pressure
200 kPa
Allowable Impact
500 m/s2
Minimum S.G.
0.9
0.8
Operational
FT-□A
Up ON, 100±15
Up ON, 186±40
Characteristic FT-□B
Down ON, 80±10
Down ON, 123±20
FT-□C
SPDT
SPDT
Cable Length
6 meter (Max. 20 meter)
Life Expectancy
2×105 Operations
Material
Cable
φ8.1, PVC*2
Float
ABS
Housing
Flange
Weight
Rope
Mounting
Cable Entry
Protection
Maximum Detection Points
*1 FT-5/FT-7 are only available for maintenance and repair parts of FT55/FT77.
*2 SCM (2-core) cable is optionally available.
*3 IP65 is optionally available.
ABS
PVC
3kg, PVC (build in steel)
PE
JIS10K100A (4 holes)
G3/4
IP45*3
6
Contact Rating
62
MODEL FQ
CABLE SUSPENDED FLOAT SENSOR
Operational Description
The Model FQ contains a hermetically sealed
reed switch, a permanent magnet, and a movable
weight.
As the liquid level rises and falls, the movable
magnetized weight slides up and down inside the
float and acts upon an encapsulated reed switch.
The float tumbles at its upper and lower limits. In
this way the reed switch changes state at the upper
limit and remains in this state until the lower limit is
reached and it changes state again.
Features
• One float gives a latched signal between two
different levels
• Differential and switch level points are easily field
adjustable
• Unique “tumbling” action eliminates chatter
• Works in dirty liquids
• Reliability/Long switch life
• Easy installation
General Description
The FQ-6 and FQ-8 cable suspended float
sensors are designed to provide the control signals
for a differential pump control system. These top
mounting sensors are suitable for use in a wide
variety of open tanks or vessels. The control
differential in the FQ-6 is adjustable from 270mm
to 1000mm and FQ-8 is adjustable from 330mm
to 4000mm. The ABS covered float and the PVC
cable make them ideal for most pump control
applications.
A number of float units can be used together
to give multiple level switch points in one flanged
holder. Each float can be easily assembled on site
and the switch operating points are adjusted by
altering the length of the cable.
Contact Rating
63
Chemical Resistance
The ABS covered float and PVC cable are
compatible with a wide range of liquids. However,
there are some liquids that may damage these
materials.
ABS can be quickly damaged by the following
liquids:
• Aromatics (benzene, toluene, xylene) cause the
float to dissolve.
• Esters and ketones cause the float to swell.
PVC cable can be used with the following
cautions:
• Oils, especially vegetable oils and fats,
tend to absorb the plasticizer of PVC cable.
Consequently the cable stiffens.
If necessary, alternative Hypalon cable is
available with FQ-8. In general, the resistibility
depends on concentration, duration of immersion,
presence of suspended solids and/or corrosive
gasses and temperature. Although these cable
suspended floats are designed for long life, we
recommend that they are replaced at adequate
intervals.
Technical Note
To avoid personal injury and protect the switch for
electrical surges, connect the float to our relay unit
Model RE7000 or similar devices.
Switch Action
Up ON: FQ-6, FQ-8, FQ-8T
Down ON: FQ-6B, FQ-8B
Specifications
Model
Drawing
FQ-6
FQ-8
Operating Temperature*1
-10 to 50˚C
Maximum Pressure
200 kPa
Minimum S.G.
0.7
0.9
Cable Length
6 meter (Max. 20 meter)
Life Expectancy
1×105 Operations
500 m/s2
Allowable Inpact
100 m/s2
Material
Cable
φ6.5, PVC
φ8.1, PVC
Float
PP (Float cap ABS)
ABS
Housing
Flange
Weight
Gray iron casting (Black painting)
Rope
Mounting
Cable Entry
Protection
Maximum Detection Points
*1 FQ-8T (High Temp. Version) is available up to 70˚C.
*2 IP65 is optionally available.
UP ON Actuation
DOWN ON Actuation
FQ66
FQ88
ABS
PVC
3kg, PVC (build in steel)
PE
JIS10K100A (4 holes)
G3/4
IP45*2
6
UP ON Actuation
DOWN ON Actuation
A˚
A˚
B˚
Switch Actuation Angle
A˚: 35˚ to 70˚, B˚: -30˚ to -70˚
Control Width
FQ-6: 0.27 to 1m
FQ66: Normally set by 270 ± 30mm, if not specified.
B˚
Switch Actuation Angle
A˚: 11˚ to 33˚, B˚: -13˚ to -39˚
Control Width
FQ-8: 0.33 to 4m
FQ88: Normally set by 330 ± 30mm, if not specified.
64
MODEL FP
PNEUMATIC LIQUID LEVEL SENSOR
Features
• Low cost: Requires only a standard 1/2” pipe in a
material compatible with the liquid
• Simple installation: Requires only a G1”
connection at the top of the tank
• Reliable: The FP employs a minimum of moving
parts. The diaphragm moves a maximum of 2mm.
No moving parts are in contact with the liquids
• Long life expectancy: The FP is designed for over
200,000 operations
General Description
The FP series pneumatic liquid level sensor is a
diaphragm actuated sensor. They are designed for
use in high viscous liquids.
The FP series cover the wide range of
applications. The FP-1A, with a neoprene
diaphragm, is for general usage. The FP-1S, with a
Viton diaphragm, is for corrosive atmosphere. The
FP-3, with neoprene diaphragm, is for cost effective.
The explosion proof, FP510, is also available, which
is approved as flameproof construction (d2G4)
by Technical Institute of Industrial Safety (TIIS),
Japanese Ministry of Labor.
Specifications
65
Operational Description
The SPDT micro switch in the FP is actuated by
compression of a captive air column in the detecting
pipe beneath the diaphragm.
Technical Notes
1. Pipe coupling shall be airtight by applying a
sealing compound in paste form. Do not use a
seal tape.
2. For low level detection, switch operating position
may rise if the detecting pipe soaks long in liquid
because pressurized air in the pipe is gradually
dissolved into liquid.
3. For high viscous liquid, we recommend to cut the
tip of the pipe at a slant or use the bigger pipe
than usual 1/2”.
66
MODEL FE
ELECTRODE LEVEL SENSOR
Operational Description
A typical system consists of three major
components, an electrode holder, the electrodes,
and a relay unit.
The electrode holder serves as a mechanical
support for the electrodes and electrically insulates
them from the tank. The electrodes are vertically
mounted to the holder, above the liquid, with their
lower ends positioned at the required actuation
levels. The relay unit provides the voltage and
current required (8V, 5mA AC Max.) for sensing as
well as suitable relay outputs.
Features
• Usable in a wide range of liquids
• Up to 6 points detection
• Safe low voltage and small currents
• Switch points easily adjusted in field
• Simple to install and adjust large terminal
enclosure for wiring
General Description
The FE series of level sensors are designed for
point level indication of conductive liquids. Used in
conjunction with one or more RE7000 relays, the FE
can reliably detect up to 6 separate levels in tanks
up to 6 meter deep. Model CE, cable suspended
electrode level sensor, is available for deep wells
with the cable length 6 meter standard and 20 meter
maximum.
Operating levels can be easily changed in the
field by cutting the length of the electrodes. The
material of electrode is selected from 316SS,
NW0001 0665, NW0276, and Titanium for the
chemical compatibility.
67
Applications
The FE series can be used in any suitable,
conductive liquids. Applications involve both alarm
point detection and pump valve control. Since the
FE series contain no moving parts, it is very reliable
and can be used in tanks where mixers or other
moving equipment would damage ordinary float
switches or level detectors.
Electrode Selection
Material
Model
316SS
FE2
FE22
FE72
FE82
NW0001,0665*1 FE3B FE23B FE73B FE83B
FE3C FE23C FE73C FE83C
NW0276*2
Titanium
FE4
FE24
FE74
FE84
Carbon
FE5
FE25
*1 NW0001,0665 is equivalent with HastelloyB®
*2 NW0276 is equivalent with HastelloyC®
The electrode material can be selcted according to
the liquid.
• 316SS: Water, Ammonia, Caustic soda, etc.
• NW0001,0665: Hydrochloric acid, etc.
• NW0276: Low temp. Hydrochloric acid, Sulfuric
acid, etc.
Titanium:
Seawater, High temp. & concentrated
•
Nitric acid, Ferric chloride, etc.
• Carbon: Hydrochloric acid, Sulfuric acid, etc.
Specifications
Model
Description
Drawing
FE2 series
Standard
FE22 series
with SS flange
FE7 series
Thread mounting
FE8 series
Thread mounting
Max. Poles
7
6
4
6
JIS10K100A (4 holes)
JIS10K100A
G2
G2
Mounting
-20 to 50˚C
-20 to 100˚C
-20 to 60˚C
-20 to 50˚C
Operating
Temperature
Option 150˚C Max.
Maximum Pressure
Atmospheric
1 MPa
Atmospheric
Material Housing
ABS
ABS or 304SS
PF (304SS cover)
PVC
1
1
304SS*
PF (304SS cover)
PVC
Mounting
PVC*
316SS, NW00010665 (Hastelloy B*3 equivalent), NW0276 (Hatelloy C*3 equivalent), Titanium
Electrode
Insulation Tube
Polyolefin*1
Cable entry
G3/4
IP43*2
Protection
IP45*2
*1 Other materials are available.
*2 IP65 is optionally available.
*3 Hastelloy is resistered name of manufacturer.
68
MODEL CE
CABLE SUSPENDED ELECTRODE LEVEL SENSOR
Features
• Easy to install for the large tanks or vessels
• 20 meter Max. cable length
• Switch points easily adjusted in field
• Up to 6 detection points
General Description
The CE is designed for use in large tanks or
vessel where the FE series can not be used due
to the limitation of electrode length. Used in
conjunction with one or more RE7000 relays, the
CE can reliably detect up to 6 separate levels in
tanks up to 20 meter deep. The PVC body, the PVC
cable, and selectable electrodes are compatible
with a wide range of liquids. The material of
electrode is selected from 316SS, NW0001,0665,
NW0276, and Titanium for the chemical
compatibility. If necessary, alternative SCM cable is
available.
Electrode Selection
Material
Model
Single Point
Multiple Point
316SS
CE-5
CE55
CE-6
CE66
NW0001,0665*1
CE-7
CE77
NW0276*2
Titanium
CE-8
CE88
*1 NW0001,0665 is equivalent with HastelloyB®
*2 NW0276 is equivalent with HastelloyC®
69
Application
The CE series can be used in any suitable
conductive liquids. Applications involve both alarm
point detection and pump valve control. Since
the CE series contain no moving parts, it is very
reliable and can be used in tanks where mixers or
other moving equipment would damage ordinary
float sensor or other level detector. The CE series
consist of cable, body, and electrode, and electrode
is electrically insulated by the cable and body.
Therefore, CE can be installed at the slop wall and
through the pipe.
Operational Description
When the tips of electrode are touched by the
conductive liquids, the current is passed between
electrodes. When the liquid level is decreased from
the point of electrodes, the current is not passed
between electrodes. The relay is opened or closed
by the block or unblock of current.
Specifications
Model
Drawing
CE series
-20 to 50˚C
200 kPa
6 meter (Max. 20 meter)
6.5, PVC
PVC
316SS, NW00010665 (Hastelloy B*1 equivalent),
Electrode
NW0276 (Hastelloy C*1 equivalent), Titanium
Housing
ABS
Flange
PVC
Weight
PVC
Rope
PE
Mounting
JIS10K100A (4 holes)
Cable Entry
G3/4
Protection
IP45*2
Maximum Detection Points
6
*1 Hastelloy is rsistered name of manufacturer.
*2 IP65 is optionally available.
Operating Temperature
Maximum Pressure
Cable Length
Material
Cable
Body
Specifications
Model
Drawing
RE7000
Supply Power
Power Consumption
Relay Contact
Power Source
Operating Resistance
Release Resistance
Operating Temperature
Operating Humidity
Indication
90 to 132V/180 to 264V AC, 50/60Hz
Approx. 1.5VA Max.
1 SPDT, 240V 5A AC, 30V 5A DC (Resistive)
8V 5mA AC
4 kΩ or less
15 kΩ or more
0 to 50˚C
85%RH Max.
Green LED for power states
Red LED for relay states
Separation Distance
1km Max.
Use CVV-S 0.75mm2 cable
Mounting
11-pin base, plug-in type
Base is optional and must be ordered separately.
70
MODEL MT
ELECTRICAL CONDUCTIVITY LEVEL SENSOR
Operational Description
When AC power is applied to a pair of isolated
electrodes, without liquid between them, no current
is delivered. When there is liquid, it becomes a part
of electrical circuit and a current is delivered.
When liquid contacts the electrode, MT directly
detects the resistance and compares it with the
value set in the relay unit to determine the liquid
presence, then sends signals to amplifier, causing
the relay to give output signals.
Features
• Stable operation with build up of scum and slurry
• High durability
• Easy operation of relay unit
• Easy maintenance
General Description
Model MT system is a conductance actuated
control system utilizing the electrical conductivity
of the liquid to carry a small current which when
sensed, activates the appropriate controls. The
multi-points probe has the capability to control
several pumps and alarms, as well as indication of
levels, using discrete set points.
71
Applications
Model MT system can be used in any suitable
conductive liquids. Applications involve both alarm
point detection and pump valve control. Since MT
system contain no moving parts, it is very reliable
and can be used in tanks where mixers or other
moving equipment would damage ordinary float
sensor or other level detectors.
MT system is very reliable to use in Waste water,
Sewage water, Fresh water, and Conductive liquids.
Manhole pump control is one of biggest application
for MT system.
Specifications
Sensor
Model
Drawing
Number of detection point
Operating Temperature
Material
Cable
Body
Electrode
Relay Unit
Model
Drawing
Supply Power
Power Consumption
Relay Contact
Power Source
Detection Sensitivity
Operating Temperature
Indication
Separation Distance
Mounting
MT10/1
MT10/3
MT10-Z
1
3
0 to 80˚C
φ8.1, PVC
PE/PVC
316SS
6
φ 6.5, PVC
PE
φ6.5, PVC
PE
RE9000
100 to 240V AC, 50/60Hz or 24V DC
Approx. 7VA Max. for 240V AC, 7W Max. for 24V DC
240V 5A AC (resistive)
12V AC (1mA Max.)
1 kΩ , 4 kΩ , 20 kΩ , 80 kΩ ,
-10 to 60˚C
Green LED for power states
Yellow LED for relay 1 states
Red LED for relay 2 states
500m Max.
35mm DIN rail or 2 x M3 screw
72
MODEL LZ
LEAKAGE OIL SENSOR
• Oil leak detection for oil refinery, petrochemical,
cogeneration, and power plant
• Oil leak detection for storage tank of crude oil and
refined oil in oil refinery plant
Hydraulic Power Plant
Oil detection in leakage water
In rare case, oil is leaked
from inlet valve.
So, lead detector shall be
installed for safety.
Features
• Strong for buildup
• Strongly built sensor
• Excellent maintainability
• Easy to replace from existing sensor
General Description
Model LZ is designed to detect the leakage oil in
sump pit, pit in oil retaining wall, pump yard, and
etc. Since Model LZ contains no moving parts, it
is very reliable and durable. The construction is
very simple, so it is easy to maintain. The principle
of operation is to detect the impedance between
Electrode and earth, so Model LZ is not affected by
the conductive build up.
73
Operational Description
Model LZ detects impedance between electrode
and earth ground. When the electrode is in water,
impedance is low. But when the electrode is
covered by oil, impedance is increased and output
signal.
Application
• Oil leak detection for oil refinery, petrochemical,
cogeneration, and power plant
• Oil leak detection for storage tank of crude oil and
refined oil in oil refinery plant
Specifications
Model
Drawing
Sensitivity
Operating Temperature
Maximum Pressure
Material
Body
Electrode
Cable
Protection
Model
Drawing
LZ10
7mm ± 3mm (Thickness of oil slick)
-20 to 50˚C
Atmosheric
Formed polystyrene with urethane coating
304SS
PVC, dia 6.5 × 6m (VCTF 2 × 0.5mm2)
IP67
LZ1100
Supply Power
100 to 120/200 to 240V AC ±10%
Power Consumption
Approx. 3VA (at 100V AC)
Output Signal
No-voltage relay (SPDT), 250V 3A AC, 30V 3A DC (Resistive)
Operating Temperature
-20 to 60˚C
Maximum Humidity
85 %RH
Material
Body
ABS
Separation Distance
2000m Max.
Protection
IP20
11-pin socket*1 (11PFA equivalent)
Mounting
*1 11-pin socket can be mounted on DIN rail.
74
MODEL OX
Features
• Optimizes sludge discharge control
• No influence from ambient light
• Eliminates build up and fouling of probes
• Durable construction
• Ideal for corrosive liquids
Wiring
OPTICAL INTERFACE SENSOR
General Description
Model OX optical interface sensor consists of a
sensing probe and a separate electronic converter.
Sediments, suspended solids, and interface of
immiscible liquids are detected by using an infrared
transmission operating principle. By transmitting the
infrared light with pulse modulation, a strong beam
goes through build up and fouling on the probe
surfaces. Ambient light is electrically disregarded
by using a special frequency.
The sensing probe is submersible and the PVC
housing, PP sealing connector, and FEP covered
probes are compatible with a wide range of liquids.
Special PVC cable lengths are 20 meters. The
detecting level can be easily adjusted by altering
the height of the cable fixing point.
The electronic converter has a switch selectable
High or Low fail-safe mode for relay safety. An
adjustable 0.5 to 10 seconds switching delay is
provided in order to avoid transient on/off signals.
Operational Description
The OX consists of two element probes. A beam
transmits from one which has a built in infrared
emitting diode to the other which has a built in
photo detector. When the probes are immersed
into medium, the infrared beam transmission
is decreased. This damping is detected and
converted into an electric relay output.
75
Specifications
Converter
76
MODEL CG
NEW CAPACITANCE POINT LEVEL SENSOR
General Description
Conventional Radio Frequency and Admittance
sensors are typically used as inexpensive solutions
for point level detection, but they are often times
unreliable. The model CG provides reliable,
simple, and cost effective point level detection of
liquids, solids, and adhesive conductive medium.
Sophisticated application with fluids, operation
conditions that requires periodical re-calibration
with conventional simple sensors due to the
deviation of working conditions like Fluid’s chemical
configuration, Humidity, Temperature, Resistance
value factor, build up can not normally be covered
with conventionally simple capacitance level
sensors.
Our new model CG can work well both to simple
fluids, difficult fluids, and sophisticated environment
due to the patent pending circuitry.
Features
• One push adjustment by parameter
• Various function by microprocessor
• LCD for operation check
• Improved function for material build up
• Outstanding reliability
• No need to adjust in actual liquid
77
Operational Description
The model CG consists of an oscillation circuit
and a detection circuit. Both circuits synchronize at
a constant 1.4MHz frequency in the air,
f1=1/2 π LC.
The frequency of detection circuit is changed
from the air to in the medium by taking in the
capacity of the medium, f2=1/2 π L(C+ΔC).
The oscillation circuit automatically follows
to synchronize with the frequency of detection
circuit. When the resonance frequency shifts to the
detection set point, the relay is energized.
Key Features and Benefits
• Patent circuitry
The CG consists of an oscillation circuit and a detection circuit, and the frequencies of these two circuits
are automatically synchronized. This function provides Free from Initial Calibration, Wide Sensitivity Range,
Resist Build up Problem, and Highly Stable Detection.
• One push adjustment by parameter
Adjustment can be easily done by using 4 push button switches to select parameters and enter setting
values. Without the tester or tool needed, the configuration error due to personal difference will be avoided.
• Improved function for material build up
Unlike the traditional sensors which utilize the change in voltage, the CG series detect the change in
frequency caused by the change in capacitance value, resulting in minimizing the affection by build up
• No need to adjust in actual liquid
When the application condition and the device model are the same, the sensor operates successfully with
the same parameter values.
CG-2NH
CG-1FH
CG-2FH
φ114
(76)
Hex.29
R 3/4
(152)
CG-1NH
(109)
Specifications
Model
Drawing
φ20
L
100
50
φ21.7
Mounting
Supply Power
Power Consumption
Relay Output
G3/4*
JIS5K25A*
100 to 240V AC ±10%, 50/60Hz
Approx. 5VA Max.
1 SPDT, 250V 3A AC, 30V 3A DC (Resistive)
C-NO: Normally Open contact
C-NC: Normally Closed contact
Detection Time Delay
Programmable between 0.0 to 25.5 seconds
-25 to 60˚C
Operating
Housing
-25 to 60˚C
Temperature Electrode
Maximum Pressure
1 MPa
Maximum Humidity
95% RH
Sensitivity
Dielectric constant 1.2 Min.
Capacitance between electrode 1.0 pF Min.
Only Resistance between electrode 10 kΩ Min. (L=250)
Material
Housing
ADC12
Electrode
304SS
Insulator
PE
O-ring
FPM/FKM
Cable Entry
G1/2
Protection
IP65
Fail safe
High or Low by program
Length of Electrode
250mm Standard, 2000mm Max.
*Other size of mounting, R or NPT, is optionally available.
78
MODEL KRV
CAPACITANCE LEVEL SENSOR
Features
• No adjustment required
• High sensitivity with dielectric constant as low as
1.1
• Ignores coatings and build up
• Detects solids, liquids, and interface of two
immiscible liquids
General Description
The KRV series of capacitance sensors are
designed for point level detection of liquids, solids,
powder, or interface between two immiscible liquids.
Radio Frequency sensors are typically used to
detect liquids, but have a difficult time with solid
or powder materials. The KRV series overcome
this limitation by having a parallel LC circuit on its
oscillator and five switch selected sensitivity ranges.
The KRV series easily detect solid and powder
materials such as plastic powder/pellet, fly ash,
carbon black, and similar substances.
The KRV series reliably detect the interface
between two immiscible liquids, oil and water as an
example. The KRV can be set to operate in water
but not in oil. Additionally, the KRV will ignore heavy
oily build up on its electrode.
79
Operational Description
When the electrode is in free air, the oscillation
circuit synchronizes with the detection circuit. When
the electrode is in the medium, the synchronization
between the oscillation circuit and the detection
circuit breaks with the capacitance of the medium
being taken in. This difference is then converted into
the relay output.
Sensitivity Settings for Applications
• “A” sensitivity: 0.5PF to 5PF, ∞ to 100kΩ
For solids and liquids ( ε s 1.1) such as Aluminum
powder, Calcium carbonate, Cement, Fly ash, Ink,
Paint, Plastic resin, etc.
• “B1” sensitivity: 2PF to 5PF, 100kΩ to 50kΩ
For solids and liquids ( ε s 2.2) such as Coffee
powder, Feed, Flour, Oil, Starch, etc.
• “B2” sensitivity: 5PF to 10PF, 50kΩ to 30kΩ
For solids and liquids ( ε s 3.0) such as Grain,
Sand, Sugar, Water, etc.
• “C” sensitivity: 200PF to 1000PF, 2kΩ to 200Ω
For liquids and slurry ( ε s 50) such as
Dehydrated cake, Drainage, Night soil, Sewage,
Slurry, etc.
• “D” sensitivity: 4000PF to 50000PF, 500Ω to 2Ω
For liquids ( ε s 90) such as Chemical slurry,
Quicklime (liquid), etc.
Note: Normally, NOHKEN will set the proper
sensitivity range before shipment in accordance
with your specified medium when ordering.
Technical Information of Fluoro Plastic
• PTFE: Teflon® 4F (Poly Tetra Fluoro Ethylene),
operating temp. 200°C Max.
• FEP : Teflon® 4-6F (fluorinated Ethylene
Polypropylene), operating temp. 200°C Max.
• ETFE: Tefzel® (Ethylene Tetra Floro Ethylene),
operating temp. 150°C Max.
• ECTFE: Halar® (Ethylene Chloro Tri Fluoro
Ethylene), operating temp. 150°C Max
• PVDF: Kynar® 2F (Poly VinyliDene Fluoride),
operating temp. 120°C Max.
Wiring
Ordering Information
80
MODEL KSV
FOR CONDUCTIVE MEDIUM
Features
• Ignores heavy conductive build up
• Single probe/Mechanically strong
General Description
The KSV series of capacitance sensors are made
specifically for point level detection of conductive
medium. Applications include water, chemical
solutions, acid based slurries, conductive granules,
and sticky liquids.
Build up is one of the most common problems
for capacitance sensors. Conventional Radio
Frequency sensors solve this problem by using a
guard probes (the second or third element to the
electrode). But this complicated probe construction
tends to make probes easily broken, particularly
if twisted in agitated containers. Consequently,
conventional RF sensors are installed vertically and
limited to a fixed length, foamed in one piece.
The KSV series have overcome this limitation
by using the series resonance circuit and a single
electrode. This circuit corrects for conductive
build up by measuring its resistance. The single
electrode can be mounted in virtually any position
and is available with a number of standard
mountings.
81
Operational Description
The electrode of the KSV is a part of the
oscillation circuit. When the electrode is in the free
air, the oscillation is stopped. When it is in medium,
the oscillation is restored by measuring capacitance
of medium and the relay is energized.
Applications
• Liquids (except for oil): Water, Caustic soda,
Hydrochloric acid, nitric acid, Sulfuric acid, etc.
• Sticky conductive medium: Drainage, Dehydrated
cake, Night soil, Sewage, Sludge, Slurry, etc.
Ignores Heavy Conductive Buildup
The characteristics of the KSV circuit are defined by:
① ωb> ω c: Oscillation stops (The electrode is in the air.)
② ωb< ω c: Oscillation starts (The electrode is in the
medium.)
③ ωb=1/(C+ C)・R
ωb: Frequency when the electrode is coated or
covered by the medium.
ωc: Adjusted frequency when the electrode is in the air.
C : The stray capacitance of the electrode.
C: The capacitance of the medium.
R : Resistance of the medium.
When a conductive resistance builds up forms on the
electrode, ω b increases as R falls ( ③ ). This means ω
b> ω c so that oscillation cannot start ( ① ).
When actual medium level is covering the electrode,
ω b decreases by taking in C( ③ ). This means ω b< ω
c so that oscillation starts and the relay energizes.
In this way, by taking resistance of conductive build
up and canceling capacitance of that, the KSV prevents
false relay trips.
Value of capacitance and resistance of sensitivity are
shown on Table 1.
Table 1
Ordering Information
82
Specifications
Model
Description
Drawing
Mounting
Supply Power
Power
Consumption
Relay Output
1NH
1FH
2NH
Standard
R3/4
KRV
KSV
KRV
KSV
JIS5K25A
R3/4
100 to 120V AC, 200 to 240V AC or 24V DC
100/200, 110/220, 120/240V AV or 24V DC
Approx. 2.5VA Max.
Approx. 2.2VA Max.
1 SPDT, 250V 3A AC, 30V 3A DC (Resistive)
C-A: Normally Open contact
C-B: Normally Closed contact
Adjustable between 0.5 to 10 seconds
Not provided
-10 to 55˚C
-20 to 60˚C
1 MPa
85% RH
ADC12
304SS*
PTFE*
FPM/FKM*
G1/2
IP65
250mm
50 to 4000mm
Detection
KRV
Time Delay
KSV
Operating
Housing
Temperature
Electrode
Maximum Pressure
Maximum Humidity
Material
Housing
Electrode
Insulator
O-ring
Cable Entry
Protection
Length of
Standard
Electrode
Option
*Other materials are available.
*Specification of products shall be changed by the application and operational condition.
Technical Note
• The heat resistive type is optionally available up to 400˚C.
• Form detection and insulated tube types are optionally available.
83
2FH
JIS5K25A
3NH
3FH
4NH
Heavy duty
R1
4FH
Heavy duty Heat proof
JIS5K25A
R1
100 to 120V AC, 200 to 240V AC or 24V DC
100/200, 110/220, 120/240V AV or 24V DC
Approx. 2.5VA Max.
Approx. 2.2VA Max.
1 SPDT, 250V 3A AC, 30V 3A DC (Resistive)
C-A: Normally Open contact
C-B: Normally Closed contact
Adjustable between 0.5 to 10 seconds
Not provided
-10 to 55˚C
-20 to 60˚C
JIS5K25A
-10 to 55˚C
-20 to 180˚C
1 MPa
85% RH
ADC12
304SS*
PTFE*
FPM/FKM*
G1/2
IP65
250mm
50 to 4000mm
84
5FH
Flash probe
6FH
Wire extension
7FH
Pipe type
8FH
Stick proof type
4-φ15
Holes
(111)
(154)
φ114
(76)
14
Specifications
Model
Description
Drawing
L
φ105
φ130
φ20
Mounting
Supply Power KRV
KSV
Power
KRV
Consumption KSV
Relay Output
Detection
KRV
Time Delay
KSV
Operating
Housing
Temperature Electrode
Maximum Pressure
Maximum Humidity
Material
Housing
Electrode
Insulator
O-ring
Cable Entry
Protection
Length of
Standard
Electrode
Option
*Other materials are available.
85
JIS5K50A
JIS5K50A
JIS5K50A
JIS5K50A
100 to 120V AC, 200 to 240V AC or 24V DC
100/200, 110/220, 120/240V AV or 24V DC
Approx. 2.5VA Max.
Approx. 2.2VA Max.
1 SPDT, 250V 3A AC, 30V 3A DC (Resistive)
C-A: Normally Open contact
C-B: Normally Closed contact
Adjustable between 0.5 to 10 seconds
Not provided
-10 to 55˚C
-20 to 60˚C
1 MPa
500 kPa
100 kPa
1 MPa
85% RH
ADC12
304SS*
C3604BD
304SS*
PE*
FEP (Pipe)
FRP
FPM/FKM*
G1/2
IP65
65mm
1000mm
250mm
5 to 500mm
500 to 10000mm
50 to 4000mm
20
φ35
9NH
9FH
25FH
High Sensitivity
JIS5K50A
100 to 120V AC, 200 to 240V AC or 24V DC
100/200, 110/220, 120/240V AV or 24V DC
Approx. 2.5VA Max.
Approx. 2.2VA Max.
1 SPDT, 250V 3A AC, 30V 3A DC (Resistive)
C-A: Normally Open contact
C-B: Normally Closed contact
Adjustable between 0.5 to 10 seconds
Not provided
-10 to 55˚C
-20 to 60˚C
1 MPa
85% RH
ADC12
304SS*
PTFE*
FPM/FKM*
G1/2
IP65
250mm
50 to 4000mm
JIS5K50A
Special type
R1
86
Special type of sensor
Specifications
Description
Drawing
Application
Adaptive Model of PCB
Mounting
Material Housing
Electrode
Insulator
Maximum Pressure
Operation Temp. (Electrode)
Power Supply
Power Consumption
Relay Output
Insulation Resistance
Withstand Voltage
Vibration Proof
Maximum Humidity
87
2 points detection
3 points detection
4 points detection
Multi points detection by one sensor
KRV, KSV, KRS (The shape of housing is different for separation type.)
JIS5K50A
JIS5K80A
JIS5K100A
ADC12
304SS
PE (Option: PTFE, Ceramic, etc.)
1 MPa
-20 to 60˚C
100V, 200V AC ±10% 50/60Hz (KRV: 100-120/200-240V AC ±10% 50/60Hz)
KRV: approx. 2.5VA,
KRV: approx. 5.6VA,
KRV: approx. 6.6VA,
KSV: approx. 2.4VA
KSV: approx. 3.8VA
KSV: approx. 5.6VA
250V 3A AC, 30V 3A DC (Resistive)
100 Ω or more, 500V DC
1500V AC, 1 Minute
10 to 55 Hz (Amplitude 1.5mm)
85% RH
Sanitary Flange
Slide Flange
Pipe line A
Pipe Line B
Horizontal mounting
No space at the top
Detection point
Detect liquid inside of pipe
of tank
changeable
KRV, KSV, KRS, KST, KRT, KRE65, KSD, KRD, KUV, KUD
Sanitary 1.5S
JIS5K50A
JIS5K80A
ADC12
304SS
PE (Option: PTFE, Ceramic, etc.)
1 MPa
1 MPa
-20 to 60˚C
100V, 200V AC ±10% 50/60Hz (KRV: 100-120/200-240V AC ±10% 50/60Hz)
Approx. 4VA (KRV . KRE65: approx. 2.5VA, KSV . KUV: approx. 2.2VA)
Foods & Beverage
250V 3A AC, 30V 3A DC (Resistive)
100 Ω or more, 500V DC
1500V AC, 1 Minute
10 to 55 Hz (Amplitude 1.5mm)
85% RH
88
MODEL KRE, KRD, KSD
Features
• Usable in hazardous location
• Up to 200 meters separation distance
• Adjustable at remote safe location
Approvals
i3aG5 for KRE and KRD system
i3nG5 for KSD system
Technical Notes:
1. Since these systems are approved as the
complete assembly, place your order for the
sensor and the amplifier together.
2. Return these systems to NOHKEN for repair and/
or replacement, when modification, disassembly,
or replacement of parts is needed.
89
INTRINSIC SAFETY CAPACITANCE
LEVEL SENSOR
General Description
For application in hazardous area, the KRE, KRD,
and KSD series are recommended. Model KRE
and KRD system are approved as intrinsically safe
of i3aG5 and Model KSD system is approved as
intrinsically safe of i3nG5 by Technical Institute of
Industrial Safety (TIIS), Japanese Ministry of Labor.
The remote amplifier of these systems can be
mounted up to 200 meters away from sensor. All
field adjustments are made at remote safe location.
KRE6000 is outdoor use, and KRE6200, KRI and
KSI is indoor use.
Recommended cable for KRE is RG62A/U which
can not be shorten or extended at site. Therefore,
separation distance has to be informed, when
you order. The 3-core shielded cable of CVVS3C is recommended for KRD and KSD. This cable
can be shorten or extended at site. Therefore, it
is convenience for you when you do not know the
separation distance.
Ordering Information
90
Specifications
91
92
Compact Type of Sensor
Specifications
Model
Description
Drawing
Adaptive Model of PCB
Mounting
Material
Housing
Electrode
Insulator
Operation
Housing
Temperature Electrode
Maximum Pressure
Maximum Humidity
Power Supply
Power Consumption
Output
Delay Timer
Protection
Cable entry
Length of electrode
93
1N
1F
Standard
1N
Compact
KSC, KRC, (KRC-1N/1F for RoHS)
JIS5K25A
R3/4
ADC12
304SS
PE
-20 to 50˚C
60˚C Max.
1 MPa
85% RH
24V DC (±10%)
0.8W Max. without load, (RoHS product: 0.9W Max. without load)
Voltage output: 1V DC or less, 22V DC or more / NPN Transistor output, 100mA Max
Adjustable between 0.5 to 10 seconds
IP65
G1/2
250mm
150mm
R3/4
2N
2F
Standard
R3/4
2N
Compact
9F
Special Sanitary
9FPT
Heat proof Sanitary
KSC, KRC, (KRC-1N/1F for RoHS)
R3/4
ISO 2"
ADC12
304SS
PE
-20 to 50˚C
60˚C Max.
150˚C Max.
1 MPa
100 kPa
85% RH
24V DC (±10%)
0.8W Max. without load, (RoHS product: 0.9W Max. without load)
Voltage output: 1V DC or less, 22V DC or more / NPN Transistor output, 100mA Max
Adjustable between 0.5 to 10 seconds
IP65
G1/2
250mm
150mm
70mm
80mm
JIS5K25A
94
MODEL KSV-9N- □□□
Features
• Compact and light weight, but integral
construction
• NPN open collector can be directly connected to
the relay output
• Operational indicator is provided
• Easy to adjust sensitivity by adjusting knob
• PR2100-7U is a Power Relay Unit for KSV-9N
series
• 2-SPST relay output and self-holding control are
available by using PR2100-7U
COMPACT CAPACITANCE
LEVEL SENSOR
Ordering Information
General Description
KSV-9N series are designed to use in small tank
and suitable for the built-in level sensor of small or
mass production devices. This sensor can detect
general application of both liquids and solids. The
option of plastic covered probe is available for
conductive medium such as aqueous solution, grain
and sugar contained moisture, metal power and so
on.
Description of Model Number
Electrode
Stainless Steel Probe Type
Plastic Covered Prove Type
Length of L2
20mm
100mm
20mm
100mm
Length of L1
Model Number
Model Number
Model Number
Model Number
150mm
KSV-9N-111
KSV-9N-113
KSV-9N-111M
KSV-9N-113M
KSV-9N-121M
KSV-9N-123M
300mm
KSV-9N-121
KSV-9N-123
600mm
KSV-9N-141
KSV-9N-143
95
Specifications
Sensor
Model
Drawing
Mounting
Supply Power
Current Consumption
Output
Oscillation Frequency
Operating Temperature
Maximum Pressure
Maximum Humidity
Sensitivity
Material
Electrode
Plug
Insulator
Cover
Nut
Protection
Length of Electrode
Controller
Model
Drawing
Supply Power
Power consumption
Relay Contact
Power source
Operating Temperature
Maximum Humidity
Indication
Mounting
Material
Protection
Base is optional and must be ordered.
KSV-9N-□□□
R1
24V DC ±10%
Approx. 21mA Max.
NPN Open Collector
Approx. 600 KHz
-10 to 70˚C (Get rid of dew)
1.57 MPa Max. for electrode
95% RH
0 to 20 pF for standard, 0 to 100 pF for low sensitivity
304SS
304SS
POM
POM
POM
IP67
150mm, 300mm, 600mm
PR2100-7U/S
100/110/200/220V AC ± 10%, 50/60 Hz
Approx. 4VA Max.
2 SPST, 200V 2A, 12V 10mA DC (Resistive)
24V DC 35mA
-10 to 40˚C
85% RH Max.
Red LED for relay states
11-pin base, plug-in type
ABS
IP40
96
MODEL VL12, 22, 32
NEW VIBRATION LEVEL SENSOR
Feature
• New principle of operation and probe construction
(Patent)
• Fail safe switch is provided
• Withstand up to 150˚C (180˚C in option)
• Less subject to build up and dead stock
Operational Description
(Patent Principle and Construction)
The vibration rod of new VL series is constructed
by using the electro magnet and the permanent
magnet. When the electro magnet is energized,
the electro magnet and permanent magnet are
attracted and repulsed. This movement makes
vibration.
The construction of vibration probe is similar
to the motor. When the motor is energized by
the battery, the back electromotive current is
generated by the influence of permanent magnet
and coil. When the vibration rod is covered with
solids or powdered material, the current flowing
to the lead wire is increased by damping of the
back electromotive current. The amplifier detects
the shifting of current level, and converts to output
signal.
General Description
Model VL is designed to detect powders,
solids, granular material including such very
light powders as instant coffee, powdered
milk, iron oxide, and toner for use in
medium and/or large sized hopper. There
are several versions available to meet a
variety of hopper/silo operations. Model
VL12, standard type, is used for high and
low level detection. For low level detection
in large silos, model VL12-G is available
with a protected shield to protect from the
lateral load on the probe. Model VL22, pipe
extension type, is suitable for high or low
alarm in large silos with top mounting. Pipe
extension up to 2500mm for Plug mounting
and 4000mm for Flange mounting are
available. Model VL32, cable extension type,
is also suitable for high or low alarm with a
flexible PVC coated cable available in length
up to 6000mm.
97
Ordering Information
Specifications
Model
Description
Drawing
Measuring Object
Mounting
Supply Power
Power Consumption
Relay Output
Detection Time Delay
Operating
Temperature
Housing
Vibration rod
Maximum Pressure
Concentrated load
Maximum Humidity
Sensitivity
Vibration Frequency
Material
Housing
Vibration rod
Extension
Cable Entry
Protection
Housing
Vibration rod
Fail safe
Indication
VL12N
VL12F
Standard
R1
VL22N
VL22F
Pipe Extension
VL32F
Cable Extension
Powder, Granular material, Pellets and Underwater sediments
JIS5K50A
R1-1/4
JIS5K50A
JIS5K50A
100 to 120V AC, 200 to 240V AC 50/60Hz
Approx. 5VA or 3W Max.
1 SPDT, 250V 3A AC, 30V 3A DC (Resistive)
C-NO: Normally Open contact
C-NC: Normally Closed contact
Approx. 3 to 5 seconds for covered
Approx. 3 to 5 seconds for free
-20 to 60˚C
-20 to 150˚C (180˚C option)
2 MPa (Except a mounting part)
0.55 kN Max. (at the tip of detection pipe)
95% RH
Bulk density of 0.2g/cm3 Min.
Approx. 300 to 500Hz
ADC12
304SS*
304SS*
G3/4
IP65
IP68
High or Low by switch
Green LED for Power status
Red LED for Relay status
-20 to 70˚C
1 kPa
PVC
IP65
IP65
*The material of 316SS is optionally available.
Wiring
Description of Fail-safe Function
98
MODEL VLS12, 22, 32
General Description
The remote controller system is available for
severe vibration on hopper or high ambient
temperature. Model VLS2200 remote controller
can be mounted up to 200 meter away from the
sensor Models VLS12, 22, 32. All field adjustments
are made at the VLS2200 controller. VLS12 is a
standard type with length of 270mm fixed. VLS22
is a pipe extension version up to 2500mm for plug
mounting and 4000mm for flange mounting. VLS32
is a cable extension version up to 6000mm from top
mounting.
Operational Description
The vibration rod of new VLS series is constructed
by using the electro magnet and the permanent
magnet. When the electro magnet is energized,
the electro magnet and permanent magnet are
attracted and repulsed. This movement makes
vibration.
The construction of vibration probe is similar
to the motor. When the motor is energized by
the battery, the back electromotive current is
generated by the influence of permanent magnet
and coil. When the vibration rod is covered with
solids or powdered material, the current flowing
to the lead wire is increased by damping of the
back electromotive current. The controller detects
the shifting of current level, and converts to output
signal.
99
SEPARATED VIBRATION LEVEL SENSOR
Features
• Remote controller system
• Self-diagnostic function
• 200m Max. separation distance provides isolation
from severe vibration or high temperature on
hoppers
• New principle of operation and vibration rod
construction (Patent)
• Less subject to build up and dead stock
Ordering Information
Specifications
Sensor
Model
Description
Drawing
VLS12N
VLS12F
Standard
VLS22N
VLS22F
Pipe Extension
VLS32F
Cable Extension
Measuring Object
Powder, Granular material, Pellets and Underwater sediments
Mounting
R1
JIS5K50A
R1-1/4
JIS5K50A
JIS5K50A
-20 to 60˚C
Operating
Housing
Temperature
-20 to 150˚C (180˚C option)
-20 to 70˚C
Vibration rod
Maximum Pressure
2 MPa (Except a mounting part)
1 kPa
Concentrated load
0.55 kN Max. (at the tip of detection pipe)
Maximum Humidity
95% RH
Sensitivity
Bulk density of 0.2g/cm3 Min.
Vibration Frequency
Approx. 300 to 500Hz
Material
Housing
ADC12
Vibration rod
304SS*
Extension
304SS*
PVC
Cable Entry
G1/2
Protection
Housing
IP65
IP65
Vibration rod
IP68
IP65
*The material of 316SS is optionally available.
Amplifier
Model
Drawing
Supply Power
Power Consumption
Relay Output
Detection Time Delay
Environmental Temperature
Maximum Humidity
Material
Cable Entries
Protection
Fail Safe
Indication
VLS2000
100 to 120V AC/200 to 240V AC 50/60Hz or 24V DC option
Approx. 5VA Max.
1 SPDT, 250V 3A AC, 30V 3A DC (Resistive)
C-NO: Normally Open contact
C-NC: Normally Closed contact
Approx. 3 to 5 seconds for covered
Approx. 3 to 5 seconds for free
-20 to 60˚C
95% RH
ADC12
G1/2 with two of I.D. 9 bushing and one of I.D. 10 bushing
IP54
High or Low by switch
Green LED for Power status
Red LED for Relay status
Yellow LED for Detection status
100
MODEL VL612,622 & VL6200
INTRINSIC SAFETY VIBRATION LEVEL SENSOR
Operational Description
The vibration rod of new VL series is constructed
by using the electro magnet and the permanent
magnet. When the electro magnet is energized,
the electro magnet and permanent magnet are
attracted and repulsed. This movement makes
vibration.
The construction of vibration probe is similar
to the motor. When the motor is energized by
the battery, the back electromotive current is
generated by the influence of permanent magnet
and coil. When the vibration rod is covered with
solids or powdered material, the current flowing
to the lead wire is increased by damping of the
back electromotive current. The controller detects
the shifting of current level, and converts to output
signal.
Feature
• Ex ia Ⅱ CT5
• Self-diagnostic function
• 200m Max. separation distance
• New principle of operation and vibration rod
construction
General Description
VL612, 622 and VL6200 are intrinsic safety
version of vibration sensor. Model VL6200 amplifier
can be mounted up to 200 meter away from the
sensor Models VL612, 622. All field adjustments are
made at the VL6200 amplifier. VL612 is a standard
type with length of 270mm fixed. VL622 is a pipe
extension version up to 2500mm for plug mounting
and 4000mm for flange mounting. Safety barrier is
required to connect between sensor and amplifier.
101
Specifications
Sensor
Model
Description
Drawing
VL612N
VL612F
VL622N
VL622F
Pipe Extension
Standard
Measuring Object
Mounting
Operating
Housing
Temperature
Vibration rod
Maximum Pressure
Concentrated load
Maximum Humidity
Sensitivity
Vibration Frequency
Material
Housing
Vibration rod
Extension
Cable Entry
Protection
Powder, Granular material, Pellets and Underwater sediments
R1
JIS5K50A
R1-1/4
JIS5K50A
-20 to 60˚C
-20 to 60˚C
2 MPa (Except a mounting part)
0.55 kN Max. (at the tip of detection pipe)
95% RH
Bulk density of 0.2g/cm3 Min.
Approx. 300 to 500Hz
ADC12
304SS*
304SS*
G3/4
IP65
IP68
*The material of 316SS is optionally available.
Amplifier
Model
Drawing
Supply Power
Power Consumption
Relay Output
Detection Time Delay
Environmental Temperature
Maximum Humidity
Material
Cable Entries
Protection
Fail Safe
Indication
VL6200
100 to 120V AC/200 to 240V AC 50/60Hz
Approx. 5VA Max.
1 SPDT, 250V 3A AC, 30V 3A DC (Resistive)
C-NO: Normally Open contact
C-NC: Normally Closed contact
Approx. 3 to 5 seconds for covered
Approx. 3 to 5 seconds for free
-20 to 60˚C
95% RH
ADC12
G1/2 with two of I.D. 9 bushing and one of I.D. 10 bushing
IP54
High or Low by switch
Green LED for Power status
Red LED for Relay status
Yellow LED for Detection status
Note:
1. The specification as below is based on combination of sensor and amplifier, not include safety barrier.
2. The safety barrier must be connected between sensor and amplifier for Intrinsically Safe.
3. MTL 728+(Cooper Industries plc) is recommended, prepared in locally.
102
MODEL VC
SMALL VIBRATION LEVEL SENSOR
General Description
The vibration sensor, Model VC12 is used for level
detection of solids, fine powder, granular, pellets
and sediments under the liquids such as sludge
and sand. The output signal from the sensor is
used for the alarm and/or control of electromagnetic
switch. When the detection pipe is covered by
solids, relay inside of housing is operated.
Features
◦Suitable to detect powder and grain in a small or
middle hopper
◦Operating temperature up to 150˚C as standard
◦Not affected by the temperature change
◦Accepts a wide range of input voltage
103
Operational description
(Patent Principle and construction)
The vibration rod of new VC series is constructed
by using the electro magnet and the permanent
magnet. When the electro magnet is energized,
the electro magnet and permanent magnet are
attracted and repulsed. This movement makes
vibration
The construction of vibration probe is similar
to the motor. When the motor is energized by
the battery, the back electromotive current is
generated by the influence of permanent magnet
and coil. When the vibration rod is covered with
solids or powdered material, the current flowing
to the lead wire is increased by damping of the
back electromotive current. The amplifier detects
this shifting of current level, and converts to output
signal.
Specifications
Model
Drawing
Measuring Object
Mounting
Supply Power
Power Consumption
Relay Output
Detection Time Delay
Operating
Housing
Temperature Vibration rod
Maximum Pressure
Concentrated load
Maximum Humidity
Sensitivity
Vibration Frequency
Material
Housing
Vibration rod
Cable Entry
Protection
Housing
Vibration rod
Fail safe
Indication
VC12N
VC12F
Powder, Granular material
R3/4
JIS5K50A FF
100 to 240V AC 50/60Hz
Approx. 5VA (100V AC)
Non-voltage relay contact (SPDT)
250V 3A AC / 30V 3A DC
Approx. 3 to 5 seconds for covered
Approx. 3 to 5 seconds for free
-20 to 60˚C
-20 to 150˚C
2 MPa (Except a mounting part)
0.55 kN Max. (at the tip of detection pipe)
95% RH
Bulk density of 0.2g/cm3 Min.
Approx. 900 to 1100 Hz
ADC12
304SS
G3/4
IP65
IP68
High or Low by switch
Green LED for Power status
Red LED for Relay status
Ordering Information
104
MODEL VF
FLAT FACE VIBRATION LEVEL SENSOR
Features
◦Suitable for low level detection of middle or large
hopper
◦Wide range of sensitivity setting
◦Fail safe switch is provided
◦Accepts a wide range of input voltage
General Description
Vibration level sensor VF is to detect presence
of powder and granular material at a desired level
to send signals utilized for alarm output or control
of electromagnetic switches. The vibration plate
at the tip of sensor is inserted in the tank to detect
the presence of measuring object. Whit minimum
inserted length and no mechanical moving parts,
VF can achieve high durability.
Operational Description
The vibration plate has a magnet inside it,
and when the pulse magnetic field produced by
the electromagnet is applied, the magnet starts
vibrating, causing the plate itself to vibrate. The
vibration frequency changes when the plate is
covered by medium or exposed, and causes
the change in voltage at the electromagnet. The
voltage change is detected and converted to
electric signals to indicate the medium presence at
the detection point.
105
Specifications
Model
Description
VF10-65
VF10-80
VFS10-65
VFS10-80
VFS1000
Separation
Integral
Sensor
Amplifier
Drawing
Measuring Object
Mounting
Supply Power
Power Consumption
Relay Output
Detection Time Delay
Operating
Housing
Temperature Vibration rod
Maximum Pressure
Maximum Humidity
Sensitivity
Material
Housing
Detection part
Cable Entry
Protection
Housing
Detection part
Fail safe
Indication
JIS5K65A
JIS5K80A
Powder, Granular Material
JIS5K65A
JIS5K80A
100 to 240V AC ±10% 50/60Hz
Approx. 4VA (100V AC)
Approx. 2.5VA (100V AC)
Non-voltage relay contact (SPDT)
250V 3A AC / 30V 3A DC
Approx. 2 second for turn on
Approx. 2 seconds for turn off
-20 to 60˚C
-20 to 100˚C
100 kPa (Static pressure)
95% RH Max.
Bulk density of 0.2g/cm3 Min.
ADC12
304SS, Silicone
G3/4
IP65
IP68
High or Low by switch
Green LED for Power status
Red LED for Relay status
3×G1/2
IP54
Ordering Information
106
MODEL VH10, 20
VIBRATION LEVEL SENSOR
Operational Description
The vibration reed is welded on two
sustention pipes in order to stabilize the
vibration mode. Two piezo-electric elements
are mounted on the vibration reed. One
provides vibration and the other detects
damping of vibration. When the vibration
reed is covered by material, the piezo-electric
element detects damping of vibration. The
electronic circuit detects the damping and
converts into relay output.
Features
Ordering Information
• For very low bulk density 0.02g/cm
3
0.20g/cm3
to
• Uses solid state piezoelectric vibration
principle for detecting material level
• Provides relay output when material contacts
probe and dampens vibration
General description
The VH series are designed for using very
low density powder or material such as fibers,
perlite, diatomaceous earth, toner, carbon
black, white carbon, expanded polystyrene,
etc. VH10 is a compact version used for high
and low level detection. VH20 is suitable for
high alarm in large silos. Pipe Extension up to
2500mm for N model and 4000mm for F model
are available.
107
Specifications
Model
Description
Drawing
Mounting size
Supply Power
Power Consumption
Relay Output
Detection
Time Delay
Operating
Housing
Temperature Vibration rod
Maximum Pressure
Maximum Humidity
Sensitivity
Vibration Frequency
Material
Housing
Vibration rod
Extension
Cable Entry
Protection
Housing
Vibration rod
Indication
VH10NH
VH10FH
Standard
R1
VH20NH
VH20FH
Extension tube
JIS5K50A
R1-1/4
JIS5K50A
90 to 132V AC, 180 to 264V AC 50/60Hz
Approx. 5VA Max.
1 SPDT, 240V 3A AC, 30V 3A DC (Resistive)
C-NO: Normally Open contact
C-NC: Normally Closed contact
Approx. 1 second for covered
Approx. 5 seconds for free
0 to 60˚C
-20 to 80˚C
1 MPa
95% RH
Apparent density of 0.02g/cm3 Min.
Approx. 550 Hz
ADC12
304SS*
304SS*
G3/4
IP65
IP68
Green LED for Power status
Red LED for Relay status
*Other materials are available.
Wiring
Example of powder with low apparent density
Medium
Perlite
White carbon
Ultrafine particle of anhydrous
silica
Fluorite
Micro titanium dioxide
Silicon nitride whisker
Diatomaceous earth
Apparent density
0.02 to 0.5
0.03 to 0.05
0.04 to 0.06
0.08 to 0.12
0.08
0.1
0.1 to 0.15
108
MODEL VM
Features
• Simple and Compact design
• Ideal for small hoppers
• Wide sensitivity range from 0.2g/cm
• Patented principle and probe construction.
3
General Description
The VM series is designed for use in small
hoppers up to 2 meter in height. This compact level
sensor is suitable for bulk handling bins, hoppers,
feeders, etc. It helps prevent hopper overflow,
empty holding tanks, and plugged chutes.
109
Operational Description
The detection rod vibrates by installing piezoelectric element and acceleration pick-up mounted
detection rod at the tip of the internal detection
rod. The piezo-electric element provides vibration
and the acceleration pick-up detects damps in the
vibrational amplitude. Covered with solids dampens
vibration of the detection rod. The electronic circuit
detects the damping of these vibration and converts
into the relay output.
Ordering Information
Specifications
Model
Drawing
Mounting
Supply Power VM41
VM42
VM49
Power Consumption
Relay Output
Detection
Time Delay
Operating
Housing
Temperature Vibration rod
Maximum Pressure
Maximum Humidity
Sensitivity
Vibration Frequency
Material
Housing
Vibration rod
Cable Entry
Protection
Housing
Vibration rod
Fail safe
Indication
VM41, 42, 49
G3/4 or NPT3/4
90 to 132V AC 50/60Hz
180 to 264V AC 50/60Hz
24V DC
Approx. 2.5VA or 1W Max.
1 SPDT, 240V 3A AC, 30V 3A DC (Resistive)
C-NO: Normally Open contact
C-NC: Normally Closed contact
Approx. 3 seconds for covered
Approx. 3 seconds for free
-20 to 60˚C
0 to 60˚C
1 MPa
85% RH
Apparent density of 0.2g/cm3 Min.
Approx. 500Hz
ADC12 and ABS
304SS
G3/4
IP65
IP68
High or Low by switch
Red LED for Relay status
110
MODEL VP11
Features
• Low-cost piezoelectric vibratory level sensor
• Easy to use 26mm proximity style housing
• Not affected by moisture, humidity, or temperature
variations
• Standard transistor output
• Relay output optional with PR2100/2200
General Description
The VP 11N is a single point level sensor
designed for low-cost, solids state indication and
control of powder levels in a small hopper or bin.
The VP works best in granular and powdered
materials of medium to high bulk density. It is
especially useful in applications for detection of high
and low level. The VP is an excellent replacement
of mechanical rotary paddle level controls that are
prone to failure. An example is the high level control
in a plastic resin feed hopper used in injection
molding. The sensor must not be exposed to high
temperatures or excessive abrasion.
111
VIBRATION LEVEL SENSOR
Operational Description
The sensor utilizes a piezoelectric vibration
element to create a specific vibration frequency.
If the vibration diaphragm is vibrated for pulse
vibration frequency, the reverberant vibration is
occurred. When the material covers the sensor,
more reverberant vibration is dampened for a
given length of time. The damping of reverberant
vibration is detected by a piezoelectric element,
and processed through a comparator circuit. The
sensitivity is set by the volume of damping for a
given length of time.
AC voltage with relay output is optionally available
by using our power relay unit, Model PR2100 or
PR2200.
Specification
Model
Drawing
Measuring Object
Mounting
Supply Power
Current Consumption
Relay Output
Detection Time Delay
Operating Temperature
Maximum Pressure
Maximum Humidity
Sensitivity
Material Body
Diaphragm
Fastener
Cable
Protection
Indication
VP11N
VP11F
Powder, Granular material
G3/4
ISO 1-1/2S
24V DC
Approx. 20mA DC Max.
NPN open collector100mA DC Max. Residual voltage 1V Max.
Approx. 3 seconds
-10 to 60˚C
500 kPa
95% RH
Aparent density of 0.2g/cm3 Min.
304SS
316SS
Brass
φ3×2000mm (3×0.2mm3), PVC
IP55
Green LED for Power status
Red LED for Relay status
Orange LED for Detected recovery
Data of measuring object (For reference)
Repose
Apparent
Shape
Sample name
angle
density
Plastic pellet
0.8
Cylindroid
35˚
Rice
0.9
Oval
30˚
Rice under water
0.4
Oval
30˚
Fine power
40˚
Instant coffee
0.5
or granuler
Fine power
45˚
Powder suger 0.4 to 0.8
or granuler
Fine power
45˚
Flour
0.5 to 0.7
or granuler
Aluminium
0.15
35˚
hydroxide
Middle
Middle
Middle
Detection
point
10mm
10mm
10mm
Middle
10mm
Middle
25mm
Adhesive, Low flowability
Middle
25mm
High adherability with moisture
High
35mm
Adhesive, Low flowability
Sensitivity
Characteristic of sample
Detection
Repose
Apparent
Characteristic of sample
Sensitivity
Shape
point
angle
density
Shampoo
1.08
Syrup
60 P
Middle
10mm
Adhesive
Rinse
1.03
Paste
35 P
Middle
10mm
Low flowability
Honey
1.01
Syrup
120 P
Middle
15mm
Adhesive
Mayonnaise
0.95
Paste
140 P
Low
5mm
Low flowability
*1 The center of adjustable range for sensitivity volume is 12 o’clock.
High sensitivity: 1 to 3 o’clock. Middle sensitivity: 10 to 1 o’clock. Low sensitivity: 8 to 10 o’clock.
*2 In case of using VP to detect aluminium hydroxide, pay attension to the environmental condition and
mounting.
*3 The meaning of "P" at viscosity is Poise.
Sample name
112
MODEL R7
ROTATING PADDLE SENSOR
General Description
The R7 series of miniature rotating paddle
sensors are designed for use with plastic molding
or injection machines and extruders. It can also be
designed into equipment such as grain processing
machines and granulating equipment. These
products are the most compact units of their type
and are deigned to provide reliable services.
There are two standard versions of the R7, the R7-X
series for indoor use, and the R7-Z for outdoor use.
The R7-XL/ZL is a custom made long shaft version
up to 1000mm. The R7-XT is designed to resist
temperatures up to 120°C.
Features
• Miniature size
• Simple torque adjustment
• Reliable design
• Easy maintenance and repair
• Low cost
Conformity
CE marking for R7-Z standard type
Specifications
Model
Description
Drawing
Mounting
Supply Power
Power Consumption
Contact Rating
Operating
Housing
Temperature Detection part
Material
Housing
Mounting part
Spindle
Paddle
Seal Part
Cable entry
Cable
Protection
Motor Rotation
Life Expectancy
113
R7-Z
CE marked
R7-ZL
Extension, CE marked
G3/4
24, 100, 110, 120, 200, 220, 240V AC 50/60Hz
Approx. 1.5VA Max.
1 SPDT, 250V 3A AC/30V 4A DC (Resistive)
C-NO: Normally Open contact
C-NC: Normally Closed contact
-10 to 45˚C
-10 to 70˚C
ADC12 and ABS
Brass (galvanized)
304SS
PC or 304SS
NBR, PTFE
G1/2
IP65
1rpm (50Hz) or 1.2rpm (60Hz)
1×105 Operations (Micro switch)
Operational Description
When the power is applied to an R7
sensor, a motor powers a revolving shaft
to which a paddle is mounted. When the
material level inside the container reaches
the revolving paddle, the paddle rotation is
halted then the motor itself starts rotating
around the shaft and activates an isolated
SPDT micro switch. This removes power
from the motor so that it stops rotating
and an alarm signal is provided. When the
material level falls below the paddle, the
motor resets and the micro switch restores
the revolving action.
Ordering Information
Technical Note
Detection torque can be easily adjusted
on site by changing the spring position.
The R7 has four torque setting (see chart
below). The standard setting is “B”. Adjust
to “A”, if there is a slight vibration on the
hopper. Adjust to “C” or “D”, if the load is
small.
R7-X
Standard
R7-XL
Extension
G3/4
24, 100, 110, 120, 200, 220, 240V AC 50/60Hz
Approx. 1.5VA Max.
1 SPDT, 250V 3A AC/30V 4A DC (Resistive)
Yellow-Red: Normally Open contact
Yellow-Blue: Normally Closed contact
-10 to 45˚C
-10 to 70˚C
ADC12 and PC
Brass (galvanized)
304SS
PC or 304SS
NBR, PTFE
5-core cable, 300mm (φ10.5 VCTF, 0.5mm2)
IP40
1rpm (50Hz) or 1.2rpm (60Hz)
1×105 Operations (Micro switch)
R7-XT
Heat Resistive
-10 to 120˚C
114
MODEL RB
ROTATING PADDLE SENSOR
Features
• Simple torque adjustment
• Easy maintenance and repair
Application
• Powder: Cement, Coal dust, Glass powder,
Gypsum, Lime powder, Carbon, Iron powder,
Sand, Flour, Sugar, etc.
• Granular: Plastic pellet, Fertilizer, Cereal, etc.
• Block: Coal, Lime stone, Coke, Aggregate, Ore,
etc.
Technical Note
Detection torque can be easily adjusted on site
by changing the spring position. The RB has four
torque setting. The standard setting is “B”. Adjust
to “A”, if there is a slight vibration on the hopper.
Adjust to “C” or “D”, if the load is small.
Specifications
Model
Description
Drawing
Measuring Object
Mounting
Supply Power
Power Consumption
Contact Rating
Operating
Housing
Temperature Detection Part
Maximum Pressure
Material
Housing
Flange
Shaft
Paddle
Seal Part
Cable Entry
Protection
Housing
Detection Part
Motor Rotation
Life Expectancy
115
RB20F
Standard
RB21FT
Heat Resistive
Powder, Granular material, Pellet
JIS5K65A (t=5)
JIS5K65A (t=6)
100, 110, 200, 200V AC 50/60Hz
Approx. 4W Max.
1 SPDT, 250V 5A AC, 30V 5A DC (Resistive)
C-H: Normally Open contact
C-L: Normally Closed contact
0 to 45˚C
0 to 50˚C
0 to 180˚C
20 kPa
ADC12
Steel
304SS
304SS
304SS
NBR, PTFE
G1/2
IP55
IP45
1rpm (50Hz), 1.2rpm (60Hz)
5×105 Operations (Micro switch)
General Description
The RB series of rotating paddle sensors are
designed to use in the application such as coal,
limestone, ore, and etc, where our R7 series can
not be used. Moreover, RB can also be used in the
application of powder and solid detection by changing
the detection torque.
The RB20 series are standard type. The RB21
series are custom made for heat resistive, extension,
and long shaft. The maximum operation temperature
is up to 250˚C. The extension type is up to 1000mm,
and long shaft is up to 3000mm at vertical mounting.
Operational Description
When the power is applied to an RB sensor, a
motor powers a revolving shaft to which a paddle
is mounted. When the material level reaches the
revolving paddle, the paddle rotation is halted then
the motor itself starts rotating around the shaft and
activates an isolated SPDT micro switch. This removes
power from the motor so that it stops rotating and an
alarm signal is provided. When the material level falls
below the paddle, the motor resets and the micro
switch restores the revolving action.
RB21FL/FLV
Pipe Extension
RB21FBV
Shaft Extension
Powder, Granular material, Pellet
JIS5K65A (t=6)
304SS
JIS5K65A (t=5)
100, 110, 200, 200V AC 50/60Hz
Approx. 4W Max.
1 SPDT, 250V 5A AC, 30V 5A DC (Resistive)
C-H: Normally Open contact
C-L: Normally Closed contact
0 to 45˚C
0 to 50˚C
20 kPa
ADC12
Steel
304SS
304SS
NBR, PTFE
G1/2
IP55
IP45
1rpm (50Hz), 1.2rpm (60Hz)
5×105 Operations (Micro switch)
116
MODEL MWS
Features
• Non-contact sensing
• High penetration, 60m operation range
• Unaffected by adverse environments
• Simple beam alignment
• Selectable detection mode, Block or Unblock
• Adjustable on delay timer
General Description
The MWS-ST/SR-11 microwave sensor is a
level sensor consisting of a transmitter (MWSST-11) and a receiver (MWS-SR-11) installed face
to face. The transmitter emits a continuous, low
power microwave beam towards the receiver
and an output relay is released when the beam is
obstructed.
The sensor has wide application across all areas
of industry where highly reliable, non-contact level
detection is required. The sensor is generally used
for process control by monitoring presence or
absence of products, flow or non-flow conditions
and point level detection in bins and silos. The
sensor may also be used as a proximity sensor for
detection of vehicles such as dump trucks and rail
cars.
117
MICROWAVE LEVEL SENSOR
Applications
• Garbage level detection in Garbage Incineration
Plant
• Flow/Non-flow detection of Cement, Sugar,
Firebrick, Wood chip, etc
• Slab position in a hot oven of an iron plant
• High level detection of pig iron for the car at iron
plant
• Presence/absence detection in a plastic bottle,
Carton box, etc
Technical Advantages
• High Penetration
24 GHz high frequency is not attenuated by dust,
moisture, or vapor, and easily penetrates process
build-up on antenna, firebrick, refractory etc.
• No Angle Adjustment Required
Approx. 30 degrees beam spread prevents
misalignment.
• On delay timer
On delay time, adjustable 0.1 to 10 seconds,
prevents instantaneous detection of falling
material whist filling.
• Safety of Microwaves
Complies with FFC Title Rule 15 and OSHA
exposure specification stated in Section 1910.97.
Specifications
TRANSMITTER
RECEIVER
118
MODEL AF10
Features
• Acoustic noise sensor for equipment maintenance
requirements and solid flow sensing in pipes
• Works in audible sound frequencies of 8 to 16kHz
• Easy to install by strap or screw to pipe or bearing
• Selfcontained with 24 to 264VAC or DC power and
1 SPST relay output
• Offset, gain and time delay adjustments with (4)
LED indicators
General Description
The AF10 is a selfcontained acoustical sensor
that detects the audible noise made by powders or
grains in a pipe or conveyor. It may also be used to
detect audible noise on mechanical equipment for
preventive maintenance.
Operational Description
The solid state sensor detects acoustical
vibrations by a piezoelectric pickup. If the audible
vibrations exceed a Gain setting limit, a relay
output occurs. Because sound is transmitted
very effectively by a metal or plastic pipe, this is
especially suitable for pneumatic conveying. A lack
of sound indicates a plugged pipe.
119
ACOUSTICAL FLOW SENSOR
FOR
SOLIDS
Applications
The AF10 works best in granular and powdered
materials that are hard. The rattle of conveyed
material on the pipe wall would convey audible
noise through the pipe wall to the transducer. The
AF10 can also be affixed to motor or machine
bearings and can be adjusted to provide an alarm
when excessive noise from the bearing occurs.
Calibration will require an audible noise source
comparable to a faulty bearing.
Specification
Model
Drawing
50
AF10
0.5
On indication
Sensitivity Adjustment
Output fanction
Detection Time Delay
Power supply
Output
Contact rating
Wthstand voltage
Insulation resistance
Power consumption
Vibration proof
Operating Temperature
Maximum Humidity
Protection
Material
Installation
Cable entry
42
80
(107)
Turning on a red LED
By OFFSET and GAIN Trimmers
Detect switch
ON delay, approx. 0.1 to 7 seconds
OFF delay, approx. 0.1 to 7 seconds
24 to 264V DC, AC (50/60 Hz)
Relay contact
240V 2A AC, 30V 2A DC (Resistive)
1500 V AC 1 min. (Between Line terminal and Output terminal)
500 V DC more than 100 MΩ (Between Line terminal and Output terminal)
Approx. 2.5 VA (at 100V AC)
100 m/s2 (60 to 2000 Hz)
-10 to 70˚C
85% RH
IP54
ABS, PC
Attaching band or metal fixtures (Option)
G1/2
Wiring
120
MODEL MP 2000
121
CONTINUOUS PROPORTIONING
CONTROLLER
Specifications
Wiring
122
MODEL RE
RELAY UNIT
Features
• Low cost relay for switching larger loads and
alternating pumps
Plug-in
mounting
•
Use
with
any of NOHKEN single point level
•
sensors when switching loads or control functions
are required
Isolated
5A relay contact
•
General Description
Model RE7000 is a control relay for switching
higher currents and voltages than those a reed
switch can cover. The RE7000 is designed that
may be used in combination to provide a variety
of control function, including multiple alarms and
alternating pumps.
Specifications
123
Wiring Example
1. Wiring Diagram for High or Low Level Alarm
2. Wiring Diagram for Latching
3. Wiring Diagram for Latching with High and Low Level Alarm
124
Typical Applications
To choose the right products for your specific
processes, we introduce some of our knowledge for
your reference.
Our successful solutions are specifide on this
catalog for:
• Beer
• Cement
• Iron & Steel
• Plastics
• Sugar
• Water Treatment
• Garbage Incineration Plant
• Semiconductor
• Manufacturing Process
• Thermal Power Station
• Biogas Plant
125
BEER
TYPICAL APPLICATIONS
, CG-6FH
, CG-5FH
(H) KRV-6FH, CG-6FH
(L) KRV-2FH, CG-5FH
KRV-2FH
KRV-2FH, CG-2FH
KRV-2FTAH is recommended for
foam detection of ⑦ wort pan.
The utilizing a φ 50mm plate, the
probe surface area is expanded to
detect foam easily.
, CG-6FH
Larger Tank: MS210S
MS360S
MS380SFeature: High accuracy
± 1mm or ± 0.1% F.S.
Working Temperature of MS200S
is up to 80˚C, but it withstands
CIP (Clean-In-Place) of 90˚C
during 10 times each week and
during 30 minutes each cycle.
Working Temperature of MS360S,
MS380S is up to 150˚C.
126
CEMENT
127
IRON & STEEL
128
129
Model: PLD120
(Titanium body and
FPM coated diaghragm)
Features: • High corrosive
compatibility
• High accuracy
130
PLASTICS
131
132
SUGAR
133
134
Water Treatment
135
136
Garbege Incineration Plant
137
138
Semiconductor Manufacturing
Process/Etching System
139
Thermal Power Plant
140
Biogas Plant
141
142
FLANGE COMPARISON TABLE
(mm)
■JIS Flange (JIS B2220 : 2004)
f (in case of Raised Face flange)
For nominal width 1
1
2
For nominal width 11/4 to 5
Nominal
width
Nominal
pres.
1B
25A
JIS 5K (kg/cm2)
D
C
g
t
JIS 10K (kg/cm2)
n-h Bolts
D
C
g
t
n-h Bolts
95
75
59 10
4-12 M10 125
90
67 14
4-19 M16
1-1/4B
32A 115
90
70 12
4-15 M12 135 100
76 16
4-19 M16
1-1/2B
40A 120
95
75 12
4-15 M12 140 105
81 16
4-19 M16
50A 130 105
85 14
4-15 M12 155 120
96 16
4-19 M16
4-15 M12 175 140 116 18
4-19 M16
2B
2-1/2B
65A 155 130 110 14
3B
80A 180 145 121 14
4-19 M16 185 150 126 18
8-19 M16
3-1/2B
90A 190 155 131 14
4-19 M16 195 160 136 18
8-19 M16
4B
100A 200 165 141 16
8-19 M16 210 175 151 18
8-19 M16
5B
125A 235 200 176 16
8-19 M16 250 210 182 20
8-23 M20
■ASME (ANSI) Flange (ASME B16.5-2003)
Nominal
width
Nominal
pres.
150Lb
D
C
g
t
300Lb
f
n-h
Bolts
D
C
g
t
f
n-h
Bolts
1B
25A
110
79.4
50.8 12.7
2
4-16 M14×L55
125
88.9
50.8 15.9
2
4-19 M16×L65
1-1/4B
32A
115
88.9
63.5 14.3
2
4-16 M14×L55
135
98.4
63.5 17.5
2
4-19 M16×L70
1-1/2B
40A
125
98.4
73.0 15.9
2
4-16 M14×L65
155
114.3
73.0 19.1
2
4-22 M20×L75
2B
50A
150 120.7
92.1 17.5
2
4-19 M16×L70
165
127.0
92.1 20.7
2
8-19 M16×L75
2- /2B
65A
180 139.7 104.8 20.7
2
4-19 M16×L75
190
149.2 104.8 23.9
2
8-22 M20×L85
3B
80A
190 152.4 127.0 22.3
2
4-19 M16×L75
210
168.3 127.0 27.0
2
8-22 M20×L90
3- /2B
90A
215 177.8 139.7 22.3
2
8-19 M16×L75
230
184.2 139.7 28.6
2
8-22 M20×L95
4B
100A
230 190.5 157.2 22.3
2
8-19 M16×L75
255
200.0 157.2 30.2
2
8-22 M20×L95
5B
125A
255 215.9 185.7 22.3
2
8-22 M20×L85
280
235.0 185.7 33.4
2
8-22 M20×L110
1
1
■DIN Flange (DIN2527)
Nominal
width
Nominal
pres.
PN 6 (kg/cm2)
D
C
t
n-h Bolts
PN 10 (kg/cm2)
D
C
t
n-h Bolts
DN25
100
75 14
4-11 M10 115
85 16
4-14 M12
DN32
120
90 14
4-14 M12 140 100 16
4-18 M16
DN40
130 100 14
4-14 M12 150 110 16
4-18 M16
DN50
140 110 14
4-14 M12 165 125 18
4-18 M16
DN65
160 130 14
4-14 M12 185 145 18
4-18 M16
DN80
190 150 16
4-18 M16 200 160 20
8-18 M16
DN100
210 170 16
4-18 M16 220 180 20
8-18 M16
DN125
240 200 18
8-18 M16 250 210 22
8-18 M16
143
NPT, National Pipe Taper
(ANSI B1, 20.1)
Straight Thread
Sanitary Ferrule (OSS/JIS-B2210)
144
R thread (JIS B0203)
(External and Internal Taper)
145
G Series (Parallel Pipe) Thread (JIS B0202)
146
147
148
149
150
151
152
153
Philosophy of Nohken
1. Management Concept
•Deliver customers’ satisfaction
•Creative Endeavors
•Respect for all personnel
humanity
Every NOHKEN employee engages
in our corporate activities with this
philosophy in mind.
2. Corporate Mission
We provide the best products,
broad-based expertise, current
solutions and quick support to
provide customers’ satisfaction.
3. Quality Policy
All personnel should ensure
perfect understanding of the
requirements of society or
customers to satisfy them. When
customers request, we supply
them safe and right products and
reliable services.
4. Warranty
NOHKEN INC. warrants that all
equipment is free from defects resulting
from faulty workmanship, defective
material or faulty design for one year
from date of original factory shipment.
This warranty is in lieu of and
excludes all other warranties of
merchantability or fitness for a
particular purpose. NOHKEN shall
not be liable for modification, misuse
or abuse, repair attempted by
unauthorized parties, direct or
consequential damage or loss or
expense resulting from the improper
installation or the use of defective
equipment.
154